I am entertained by the potential dynamic of the two lesser voters deciding the captain is an asshat and intentionally finding an impostor in order to eject him. 
Seems like that was the reason for the Terminator on
Greed--to get rid of an asshat captain--but wasn't used that way very often.
As far as the team of guessers for
TTTT, I don't think you need the group thing. Three or four people sit in front of the studio audience. Each one guesses. If he's right, he wins $5000, which doubles each time he's right. With three games in a prime time hour, it's a $20,000 grand prize--nice, not too wild.
Each impostor wins $5000 per wrong vote, or the team splits it. With only three civilian guessers, the celebrities' guesses could be tallied and combined into a single fourth vote. (A 2-2 tie could count as two half-votes.)
Who knows what the producers are thinking, but this is one way to add stakes and possibly add an interesting wrinkle without wrecking the game. It's basically the point of the $25,000 on Hollywood Game Night--enough to give the show a climax, not so much that it becomes too serious.
