Hard to tell without seeing the endproduct. Knowing anti magic shell and auras come back is nice to know and a good step, but we really know nothing about actual gameplay until alpha/beta starts which, judging from interviews, won't be this year.
I don't know if they keep bringing legion up because of player feedback or if they come up with this themselfes, but they need to realize they don't have to do that and no one expects it. We don't want to have every spec fundamentally changed every expansion, but we want the few that still don't have an identity or where ruined by legion to be worked on.(sub,arcane,shadow,(mm)hunter)
J allen brack actually summarized it pretty good. They are to fast to act and to slow to react. Priests got shadowform despite negative feedback and now they are stuck with it because it is in the game for years. We didn't want to have voidform or any fancy ressource, we got it anyway. There may be people out there that enjoy the playstyle now, but what about the players that quit over the years after the changes to shadow?
(Shadow may be a bad example because its the dominant raiding class in bfa)