Sounds like a fun game! I would propose one modification: one (or more?) of the tokens should be blank, indicating that the holder may advocate "what they really think" the text means (perhaps in exchange for earning fewer points if that one wins/is voted for). I think adds an extra twist when you play with the knowledge that "one of these interpretations is really serious" (or "could be" serious if there are more tokens than players).

If that's too easy, the blank token should mean that you can advocate any interpretation you want, so long as you don't personally believe any of it.

Also, for whoever sets up the game, the passages should be obscure (not commonly known) and the interpretations should be close to mainstream among the belief set spanned by the group.