There are a few datamined tier set changes in Patch 9.2 PTR build 41257.
Feral DruidThere's a change to the Feral Druid 4-set.
When Berserk ends youEntering Berserk causes you to lacerate all nearby enemies, dealing (700% of Attack power) Bleed damage over 10 sec. Effect #2 REMOVED Effect #1 Apply Aura: Dummy Modifies Damage/Healing Done Value: 0 NEW Effect #1 Apply Aura: Proc Trigger Spell Modifies Damage/Healing Done Value: 0 When Berserk ends youEntering Berserk causes you to Read more on wowhead.com