I think offense is the biggest need. I'm not sure how to fix that, though. First base and SS are the biggest possibilities. Culpeper is ready or almost, so he'll be up in three or so weeks. That leaves first. Maybe right field or left field.
I'd probably trade Bell, move Trevor to DH and put Jenkins or Roden or GG in left. But I didn't think that fixed things enough. I'd also consider a 2b and move Clemens to first. Can't be hard to outhit Lewis.
Definitely, if they are buying, a mid level prosprctt for a RP is happening.