Well, assuming we get alternate tree's info and we believe it, I think we'd have a lot of info to work with already.
Is it a good idea to get alternate tree's info now before he dies and go from that? Even if it just confirms townies?
We can't get Alternate tree's info right now because he said he doesn't know the results of his investigations until after he dies, so the only way to find out what he's found out is to kill him