The latest round of World of Warcraft PTR changes for 9.1.5 are here, and this update focuses on changes to Mecha-Done, a new mount, some class changes and items.
After ongoing updates to change certain content as well as work on 9.1.5 on the PTR, Blizzard's latest update on the latter is a very straightforward batch of fixes and changes. Among these include updates to Mecha-Done that range from making a drop guaranteed (Vinyl: Triumph of Gnomeregan) to increasing drop chances, or even make things a little more dicey in parts (Oxidized Leachbeast now has significantly more chances to spawn during rain.). Overall, the stated intention seems to be the result of feedback from players stuck iin parts of this string of tasks and the overhaul is intended to smooth out the path a bit so more players can grab the sweet mount for their own.
Speaking of mounts, the change also gives a unique class mount to Lightforged Draenei Paladins called the Lightforged Ruinstrider. The Monk also gets some class tweaks for the Enveloping Mist ability. PvP gets some changes as well, with the Warlock getting increased damage from Death Bolt and increased duration to Rapid Contagion.
Further changes add a new bind on account item, the Timebound Ruminations, which gives 5000 experience to one of your chosen Adventures companions when you buy and use it. There’s also a new weekly quest called "Lost Research" in Korthia Rifts, open to tier 4 characters with the Archivists' Codex or to alts on those accounts.
Overall, the changes are straightforward and look to be among those that will help the progress of development along with more subtle impacts than some of the other recent updates. You can find the complete patch notes here.