Pretty sure that defense is the most important area for improvement. Oh, and if it was me, my line-up would be:
C: OA/RW
PF: TG/AF
SF: TC/CD
SG: WW/CD/SP/RW
PG: TMG/WW
I expect that the C position will be the one that gets debated, but I think you improve defensively by letting Crocker go play perimeter defense [where I think he is one of the best in the conference]. Then I think that you drill into the heads of RW and OA what their role need to be [set screens, play tough defense and rebound]. Oh, and WW needs to pull his head out of his butt and start acting like a POY caliber player...becuase if he can do that, the entire team will improve dramatically. As to TMG, he is about exactly where I thought he was.