GREAT pitching, middle of the road offense. 8.5 for pitching (because a better closer would probably help you a lot), 5.5 for the offense. Your 1B and 2B are really below average, and your OF is really good, but not GREAT. You can definitely win with the OF, though, provided that you fix up the right side of your infield.
Your starting pitching is so strong and deep, I don't think there's any question you need to deal one of your starters for a 1B who can give you a lot more than Millar will. I don't know what scoring categories you have in the league, but there are SO many 1B out there who will give you better return than Millar. Plus, if you are willing to deal one of your better starters (Oswalt, maybe) in a deal, you might be able to get one of the real top 1B - Pujols, Helton, Thome, etc. If you want to deal a lesser pitcher, that's fine too - Frank Thomas, David Ortiz, Aubry Huff should all be available for Maddux+change at worst.