Many players fill the test server to take advantage of the temporary Legendary drop buff. Hotfixes on the PTR have already arrived, along with  info on diablo 3 items and future PTR patches.

Hotfixes have been rolling out on the Public Test Realm, to deal with issues on the server. This includes fixes for the new class sets that weren't dropping properly, and temporarily disables some Legendary powers that were causing performance problems.

And the weapon Ashbringer is coming to Diablo III with patch 2.2.0, as seen above on the PTR. This is another classic weapon from World of Warcraft. As detailed in a reddit thread, the sword changes appearance when it shifts from the Corrupted Ashbringer to the fully powered Ashbringer. The weapon's transformation was temporarily disabled by a hotfix on the PTR, due to performance issues. Many class set bonuses are getting updated in patch 2.2.0, to give more interesting gearing options for the end-game.

As there is so much going on with the new patch on the PTR, the community team has a thread devoted to feedback focused on specific topics. If you are testing out D3 items on the PTR, be sure to drop by and let them know what you think about it.