I think it would be really cool if it was possible (maybe just in a certain mode) if the Imposter could switch the role only once, like choose a innocent to switch roles with while already in the game. Again only possible to do once even if there's two or three imp, it would just be first one to do it. And it has to be done before a certain amount of time has passed, for example u can't do it in the end of the game. So maybe the impostor who changed to innocent would also win the game then if the imp wins.