Getting a big wing player, or, someone who can matchup defensively with a player like Joe Johnson or Paul Pierce.
Some available players that could fit the bill, although some might be too expensive.
Vince: for obvious reasons, but I'm not sure he'll provide the defensive boost we need on the wing. Could have done a better job for us than DD did not JJ, but I can't imagine it would be a huge upgrade. He was never really known for his defense, even is his brightest days.
Lance Stephenson: He's seemingly volatile, but quite talented. The price tag would be too high, and he would certainly have to start. This would likely stunt Ross' growth and opportunity.
Trevor Ariza: He would be an interesting addition. He's athletic, can score, and still has some left in the tank unlike maybe VC. A little on the skinny side, and might get exploited on D.
Luol Deng: Deng would be a strong wing, with good size. He's improved his shooting considerably over his career from the days when he couldn't even hit a three. It must be noted that somehow the Bulls went on a tear without him in the lineup, kind of like a micro Rudy Gay situation. He would have helped us on the defensive end vs BK, added another proven scorer. He has big-game experience. Not sure what the price tag would be.
Danny Granger: Does he have anything left after his injury woes? He was a quality wing, which a solid skill set in prior to all of his recent struggles. It would be worth a shot if we could get him on a cheap deal, and he showed some promise in rehabbing his knee. Granger at 50% would be an upgrade over Fields, and Salmons, at least on the offensive end.