Well not consent, that's the wrong word. They could've warned people beforehand, it just came out of nowhere. Yes I know, they can do whatever they want with the game, change things that didn't need "fixing" for people either to accept or complain.
Is it unfair? Sure, and it's fine to hate them, but I actually like the changes myself. There should be a way to preview the battle grunting in the character creation itself though, I agree.