Well check PTR changes, we get a slight buff for Arcane Harmony, but i fail to see how that will help raids or if at all. I see it more as an alternatie to arcane bombardment in m+, a weak one that is.
The only other change i have seen is dampen magic’s effect is getting nerfed by 50% in pvp. The reason might be… have you heard about those arcane mages owning arenas? Oh wait I haven’t either.
by the way, make sure you raise your concerns about arcane here: