Welcome to the cafe!
Your pitching is reasonably strong, which may have cost you a bit in the hitting. Don't expect a lot out of Rogers this year - I would expect there to be better prospects available on FA.
As for hitting, C & 2B are weak, as you say. But there must surely be better than Miller available in a 12-team league. What about Hernandez, Lieberthal, Pierzynski or Barrett? Surely one of them must have gone undrafted. As for 2B, that is very thin this year, but it's possible that Utley or Castillo may still be out there, or even Iguchi, as a longshot.
Did well to get Sexson late, don't worry about him.
OF is weak as you say - start Mench over Cameron, who probably won't be fit for opening day. You do really need to bolster your hitting staff somehow. You may need to be prepared to trade someone like Sexson to get an upgrade at OF.