Blind, Pacification & Raids
I kind of hate that some of DRK and Paladins tools for mitigation are largely irrelevant in raiding, and do not know why the mechanics could not persist but be balanced around (i.e with partial effects).
Blind: So this was an issue in Titan Ex: You could blind him and he might miss a table flip on a tank, and ever since then its felt every boss/ex is immune to blind. I'm unsure why this ability could not remain but simply be made to only effect auto attack mechanics, and not abilities. That would preserve it from not working on busters and tank swap mechanics, but allow it to provide some mitigation.
Pacification: Similarly, not great--almost EVERYTHING is immune to this effect. I would love to see it actually replaced off shield swipe with another effect, such as a temporary debuff the a targets damage (-5% for 5 seconds, or increased block chance).