Well, personally I have done everything except mythic +. I am walking around with a keystone still running for 2 days. So far nothing to worry about. But I guess I should head in and check it out. There have been a few guys saying how shaman seems to be the weakest healer, but none of the is actually playing a shaman. The shamans that have been playing, are optimistic so far. On top of that, the game isn’t balanced yet. It’s hard to judge now. Mechanically speaking, shamans have very good chances of being strong in mythic + as the different modifications each week can highlight different strenghts and weaknesses of each different healing spec.