I do have to start saying that she thinking that's her RIGHT to be bayonetta, and that the new actress doesn't deserve to play her is very petty, to say the least. I get that she is frustrated and angry, but still.
Having said that, 4k for the role of the main protagonist, in a game that Bayonetta personality carries alot of the plot and atmosphere, is nothing. Like, 4k in that situation is a begger's pittance. I'm completely out of the loop on how much these things cost, but someone of her talents, and the role(and ammount of lines) she plays should have to cost at least 100k.
I imagine Nintendo knew they could hire someone else to do a job at least as good as her, and I honestly can barely tell the difference between the voices(so congrats to the new actress), so Nintendo went for it. Its a business at the end of the day.
And this boycott thing will fall on deaf ears. Who in their right minds would boycott a seemingly fantastic game just because a person, albeit an important one, didn't land a gig?