Your offense is fine. Well balanced.
I think your pitching needs a little help, though.
Nixon is injured and out until May. If yahoo put him on the DL eventually, grab Burrell.
I would grab J. Williams from SF, dump Pavano.
There are also several closers available Biddle, Lopez, Koch, although none are better than the one you have. Keep an eye on Rhodes, he has not been really good in spring training...