I think all of those needs are fillable...as long as you don't insist on both a pro-bowl LT and a pro-bowl WR. Add in the draft, and you can pull off 2 WR's, 1 CB, 1 rotationl-level OT, 1 DE, a LB, and keeping McCown around as backup QB, along with a few other positions.
Finding the money for both a top flight WR and somehow pulling off a top flight LT might be a problem, since I'm not sure I see any of the latter.