I dont see how (dis)liking the story is in any way connected to being casual or not.
I dont see how (dis)liking the (part of the) graphic update is in any way connected to being casual or not.
I am 100% sure job and role balance has some glaring issues, I don't see how pointing those out is toxic.
And if casual players are toxic for complaining about the difficulty of casual content not matching their skill level.... the higher skilled players have been doing the same for years.

From what I see all points in the OP are just differences of opinion. I guess it's normal these days, for certain groups of people, to call everyone that has a different opinion "toxic".