Why be moral? I'm not sure about your criteria here. It seems to me that behavior is obviously influenced by belief more than truth -- but that does not then mean that even regular, as opposed to moral, statements are not true or false.
Similarly, our behavior will be influenced by beliefs about morality. But this does not then entail that our beliefs are or are not truth-apt.
Though, perhaps in a round-about away, our meta-ethical beliefs could influence behavior -- whether they, themselves, are true or no, too.
It seems to me that the primary difference between the three worlds is:
1. Moral statements, theories, and beliefs are not truth-apt
2. Moral statements, theories, and beliefs are truth-apt.
3. Same as 2
If we want to simplify, anyways. I'm not sure that I really like the truth-apt statement approach anymore to meta-ethics. It just seems to miss the point.