Blizzard has posted upcoming class tuning on the weekly reset which includes many buffs to underperforming Tank, Healer and DPS roles.
As we continue to monitor class performance in instanced group content as well as PvP, we regularly adjust classes that are over- or under-performing. Based on recent data, observations, and feedback from players, we intend to make the following adjustments during scheduled weekly maintenance (on June 6 in this region).
