I think your team looks good. You have solid power and RBIs....Chone can single handedly dominate SBs on certain weeks. You have other multi-skilled players to back that up. Counting OBP, Granderson has been doing a solid job, he takes walks and is behind a good lineup, so his BA should climb. I dropped him in my league a few weeks ago and no one has picked him up. If there are better options out there I suggest you pick them up, it wouldn't hurt any. If that is Lu. Gonzo of AZ, I like him even though he's old. He'll still get the RBIs, he'll walk to help your OBP, and he hits a ton of doubles to help your SLG.
Your pitching staff is solid. Willis will come around, and so will Davis. I think Lieber will be okay at best, but he does have a nice line-up to get him those wins. Chacon is not the greatest, if there is a young pitcher on the wire, i suggest you drop Chacon and take a chance. I would consider the same with Lieber.