I guess i see your point on roles being revealed.

Yeah, the blind guy can listen to the talk of everyone at night, but their names will not be shown. People have been complaining about night start since people die, but with blind guy, you can have some clue because you can look at the way people speak. People will no longer have to rely on sheriff or investigator etc.

For those that dont speak, the role of the mime can be added so as to give those that dont talk, a strategy. The mime will be able to see what everyone does, who kills who etc but only have their vote to influence people.

Psycho could just be like a survivor role but instead mis leads the sheriff etc, he can't control who he kills unlike the serial killer.