Extend PvP talents slots and bring back more abilities, that way PvE raids and M+ players will be happy and PvP players will be happy
More defensive and offensive cooldowns, shield wall for warriors and combat readiness for rogues for example, Garrote for rogues, deep freeze for mages and so many other abilities / spells that were either pruned or given to a specific spec only from all classes
One of the biggest reasons why many PvP players stopped playing is because the game limits their game play, in my opinion I think the more buttons you have the more outplays you can make and that’s what’s fun about PvP
They’ve only reduced the number of PvP talent slots since it’s inception (in Legion you had 7 talent rows, in BfA 4-ish slots, and in SL it will be 3).
The reason is they don’t want PvE and PvP to differ from one another, no matter what that means for PvPers, i.e. no matter how bad that makes PvP.
Blizzard doesn’t care about PvPers, all they care about is PvErs and $$$.