12-team PPR league, looking for roster suggestions

[Whisper]

Hey all, I'm 2-1 in my 12-team, 1 PPR league at the moment (1 point per 10 yds rushing/receiving, 1 point per 25 yds passing, 4 pts per passing td, 6 pts per rushing/rcvg td). I feel fairly confident about my roster, but am always looking for ways to improve. Here's what I'm working with right now:

QB: Schaub
RB: CJ4.24, Benson, J Stew, J. Jones
WR: R. Wayne, D. Bowe, K. Walter, P. Harvin, E. Royal
TE: Keller, Carlson
K: Kaeding
Def: Chicago

I know that holding onto two TE's is pretty much wasted roster space, but I'm keeping both Keller and Carlson around so I have a solid bye-week starter. After that, I'll likely trade one out.

Thoughts on where I should start shoring up my weak spots? I've thought about packaging Harvin + Jones/J Stew to try and grab a receiver (or possibly throw Keller/Carlson in there and grab a WR and RB), but not sure at the moment if I even need to try that.