Yeah, I've always thought Eliza Dushku was miscast in Dollhouse. They tried to make it work for them by saying that the sameness of her characters was her underlying personality coming out, but honestly it always felt to me like Dushku just couldn't quite hack it.

They did a body switch episode in Lost Girl, which mostly showed the limited range of the actors. Except the guy who plays Dyson. He was body-switched to Kenzi and suddenly he had a sense of humor and goofiness and they had totally wasted his comedic potential for all those seasons by having him be all buttoned down and serious and boring all the time.