The win condition is like a reverse mistletoe, so I don't think that it'd be healthy for it to be able to win on n2 if it guesses two different alignments twice. With your wording, its targets wouldn't have to live, either. I don't know how I'd make the win condition easier to achieve without making it unbalanced, but I think it's fine if it has the power level of a Mistletoe anyways.
I like this concept, but the win condition I'm not so sure about. The bigger the game the more difficult it'd be to win unless there was a lot of die-off. Maybe it should only have to change four people's alignments?