I thought they'd overall remain the same, losing some stagger through ISB nerfs but getting an armor buff to compensate. But I just read this post on the WoW forums, and it looks like we're getting more nerfs than I thought:
I crossed out the ISB reduction via loss of set because that's not really a nerf as that set bonus will just be replaced by the T20 set bonus, so it's not really a nerf so much as a change in direction.What we lost:
ISB stagger reduced by 5% through skill.
ISB stagger reduced by 5% through loss of tier.
Purify reduced by 6%.
Fortifying Brew stagger amount reduced by 18%.
Blackout Strike and Keg Smash not reduced by haste.
Hot Blooded cut in half.
What we gained:
About 3% extra physical reduction through extra armor.
3 stacks of elusive brawler every keg smash rotation (with legendary chest).
I had no idea KS and BoS will no longer be reduced by haste. Pretty lame.
Edit: Now that I think about it, Hot Blooded is getting cut in half, but duration doubled, so dunno how much of a nerf that really is. I'm guessing it is a nerf for M+ on trash packs, but will be relatively the same on raids/longer fights. Also I'm guessing the 6% Purify nerf is getting offset by the new trait we're getting that buffs Purify?