Blizzard Entertainment released the preliminary PTR patch notes for patch 2.4.3. You can also get the details in the following parts. BTW, as a professional site for D3 Items, d3itemsale.com can offer you safe Diablo 3 Items at bottom price. Read the original post from the official site here.

GENERAL
New Feature: 20th Anniversary Event
A mysterious group of Cultists is stirring up trouble! Hunt them down in Adventure Mode to uncover clues that reveal a portal into Tristram’s past, and rediscover the terrifying darkness that took hold of the town so many years ago…
This event is only available in January.

This will start a few hours before the rest of the event is available on the PTR

Hardware Support
Support has been added for the Corsair Utility Engine (CUE) SDK and Razer peripherals
Supported backlit keyboards will respond to certain in-game situations like Legendary and Set item drops, characters leveling up, and more
Players will need to update their firmware for supported devices to use this feature

CLASSES
Barbarian
Overpower
Now has 3 charges
Cooldown per charge remains 12 seconds with a chance to be reduced slightly by critical strikes

Bug Fixes
Fixed an issue which caused Wave of Light to sometimes fail to deal damage when players were under the effect of Epiphany
Fixed a bug which prevented a Hydra from being spawned when two Mirror Images attempted to cast Summon Hydra at the same time

Fixed an issue which caused the active effect of Earth Ally and Fire Ally to not benefit from Attacks Per Second or +Mystic Ally damage

ITEMS
Class Specific Items
New items have been added to the game
Crusader
Armor of Akkhan
Talisman of Akkhan (Amulet)
Has been added as a 7th piece to Armor of Akkhan
The set’s current bonuses and powers remain the same
This amulet will always roll with Critical Hit Chance in addition to 3 other random affixes

Some existing class-specific Legendary items have been updated to include a unique Legendary power
Note: Existing items will not be affected by the following changes; only new versions of the items will roll with the added Legendary power

Barbarian
Saffron Wrap
The damage of your next Overpower is increased by 40-50% for each enemy hit, up to a maximum of 20 enemies

Crusader
Faithful Memory
Each enemy hit by Falling Sword increases the damage of Blessed Hammer by 50-60% for 5 seconds

Demon Hunter
Hellcat Waistguard
Grenades have a chance to bounce 3-5 times, dealing an additional 50% damage on each bounce
This bonus is increased to 800% on the final bounce
The following skills are affected by this power:
Cluster Arrow – Dazzling Arrow, Cluster Bombs, Loaded for Bear, and No Rune
Rain of Vengeance – Anathema
Strafe – Demolition
Rapid Fire – Bombardment

Monk
Rabid Strike
Spirit spenders that teleport you while Epiphany is active are also mimicked on a distant target for free

Witch Doctor
The Barber
Spirit Barrage no longer deals direct damage but instead absorbs the damage as charges
After the target has not absorbed Spirit Barrage damage for 1.5 seconds or dies, the charges detonate doing damage to all enemies within 15 yards
Damage is increased by 15-20% per charge

Wizard
Manald Heal
Lightning damage done by your Arcane spenders does an additional 20-25% of the damage over 5 seconds
This damage-over-time effect can be refreshed by additional Lightning damage and stacks
The functionality of some items has changed

Crusader
Defender of Westmarch
Can no longer summon a wolf more than once per second
Damage done by the wolf is increased for each block made during the interim

Witch Doctor
Jeram's Bracers
The minimum level for this item to drop has changed from 12 to 31 in order to match the level at which Wall of Death unlocks


Bug Fixes
Hellfire Amulet
Fixed an issue where Fetishes spawned by this item with the Fetish Sycophants passive would not reduce the cooldown of Big Bad Voodoo correctly when Starmetal Kukri was equipped

Illusory Boots
Will now properly allow Crusaders using Steed Charge to pass through walls

Flail of the Ascended
Now takes into account +Shield Bash affix bonuses in its damage
Damage stacks will now persist when changing gear and picking up items

Fixed an issue which sometimes caused cosmetic pets to be dismissed unintentionally, requiring the player to resummon them through the collections UI
Fixed a bug causing transmogrify options to not properly unlock sometimes when first acquiring an item which grants a new transmogrify option.
Fixed a bug which caused the buff from the Legendary item Ahvarion, Spear of Lycander to end when changing floors in a Greater Rift
Fixed an issue which caused the Bones cosmetic pet to incorrectly produce sound when players interacted with some user interface elements
Fixed an issue which caused +Elemental damage bonuses on weapons to override the damage bonus granted to Ancient Spear by Skular’s Salvation and its elemental type
Fixed an issue which allowed Necrosis damage from the Helltooth Harness set to be reflected back by some enemies onto Witch Doctors using projectiles like Poison Dart

SEASONS
Season Journey
The Destroyer and Guardian tiers of the Season Journey will no longer require players to augment an Ancient Legendary item using level 30 or higher and level 40 or higher Legendary gems, respectively
Along with this, the Conqueror tier now requires players to augment one Ancient Legendary item using a Legendary Gem at level 50 or higher

ADVENTURE MODE
Bounties
The number of enemy kills required to complete the following Bounties has been reduced
Kill Aloysius
Kill Axegrave
Kill Bholen
Kill Captain Donn Adams
Kill The Crusher
Rifts
The Cesspools map has been adjusted
Enemy density and overall map size have been reduced
This area can now appear as the starting dungeon in Rifts and Greater Rifts

Greater Rifts
We have made a number of changes to improve the play experience of Greater Rifts
Monsters should now be more evenly distributed on each floor in Greater Rifts
The size of each floor in a Greater Rift is now more consistent
On average, a rift should take between two and four floors to clear
There is no longer an increased chance to see the same tile set when you venture down a floor in a Greater Rift
There is now a guaranteed area at the entrance of each floor with no monsters
This area is just large enough for ranged characters to maneuver
Several additional monster types can now appear as Champions and Elites
The stacking effect of the following is now cleared upon entering a Greater Rift
The items Lord Greenstone’s Fan, Fortress Ballista and Flail of the Ascended
The skills Arcane Dynamo and Mythic Rhythm

Greed’s Realm
The portal to Greed’s Realm will now close 60 seconds after opening Greed’s chest
With this, players may now open multiple portals to the realm in a single game

Zones
The waypoint for Pandemonium Fortress Level 2 in Adventure Mode has been moved from the entrance to the midpoint of the level in order to provide quicker access to some bounties
With this change, bounties requiring you to kill unique enemies will only spawn these enemies in the first half of the dungeon, and all monsters on the map will contribute to bounty progress

Bug Fixes
Fixed an issue preventing the scene for Bounty: Research Problems from spawning
Fixed bugs that led to large open areas with no monsters in some rooms in Greater Rifts, which was especially common near the entrance to certain floors

MONSTERS
Enemies
Quality of life improvements have been made to enemies
Several enemies that leap at the player can now be killed in mid-air, including Winged Assassins, Punishers, Lacuni Huntresses, and Burrowing Leapers
Several enemies that can become un-attackable, such as Sandsharks, Snakemen, and Rockworms now spend more time vulnerable. When these enemies do burrow or stealth, they no longer remain in this state for more than 3 seconds
In addition, emerging Rockworms now always show ground cracks to help attentive players avoid their initial attack

Enemy Affixes
Shielding
Will now be cancelled immediately if the shielded monster is the last remaining monster in a pack
Reflects Damage
Now fires a projectile instead of instantly dealing damage to the player
The warning duration for this affix has been reduced from 2 seconds to 1, and its active duration has been reduced from 6 seconds to 4
Electrified
Crawling lightning generated by this affix now pierces, allowing it to damage multiple targets in succession
Juggernaut
New enemy affix
Juggernaut monsters are permanently immune to crowd control effects, but move more slowly than normal monsters
Only a rare Elite enemy can be a Juggernaut
Bug Fixes
Fixed an issue which caused Winged Assassins to sometimes travel across the ground instead of through the air when leaping
Fixed an issue which prevented Greater Rift Guardians from reliably teleporting to players when they spawned more than a few screens away
Fixed an issue which sometimes cause Rift Guardians to spawn in a location where they couldn’t be targeted

BOSSES
Belial
Now transitions more swiftly between his normal and larger version boss phases

ACHIEVEMENTS
Bug Fixes
Fixed the wording on the “Socket To Me” achievement to clarify that socketing only one gem is required

QUALITY OF LIFE
Dyes
Can now be accessed through a new tab at the Mystic
This includes Collector's Edition dyes
With this change, dyes will no longer be sold by vendors
Bug Fixes
Fixed display and text issues with some skills and items
Fixed an issue causing keybind issues when the UI was hidden
Fixed a bug which caused Followers to sometimes become idle in combat
Fixed an issue which prevented Followers from being dismissed while they were incapacitated in battle
Fixed an issue which allowed pets and Followers to be attacked immediately after exiting a portal.

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