I wonder if Moana was ever serious about wanting David out, or if that was just something she said so that people wouldn't think she was riding on his coat tails.
If she is ever going to strike the time is now, maybe teaming up with Brooke and Sharn for an actual blindside. I don't think it will happen though, I think it's much more likely Sharn wants to be in the final two with David, in which case she will of course lose again. If anyone has any clue about how to win, they'll be planning to take Tarzan to the end, which I think David is onto.