Tanks got even more sustain they do not need, DPS got their reactionary healing buffed. Healers got even more heal buttons they won't use. All is well. /s
As an aside. Got Dead Ends with DRK tank in a roulette yesterday. That was one of the few times, where i enjoyed healing a while, where i legit used most of my healing buttons. Like that's how dungeons should be.
Instead you get WARs who just invalidate your whole kit and in DT WARs are going to do it even more.