Should a game series change its art style with each new installment?

She was originally voiced by the lady from cibo matto
youtu.be/EN9auBn6Jys

That's the gag. Gorillaz is an "artificial" band, the actual band members are actually expendable, and it's designed to be successful pop music, but the guy running the show is using the "mass produced pop" band to get experimental in ways your average band can't be.