Sullinger has been the team's best rebounder and is among the league's best rebounders so that's kind of hard to just let go of, but at the same time, his scoring has been inconsistent. His defense has been surprisingly efficient. That does come from playing next to Amir Johnson but Sully has shown more effort in that area.
I'm between the "Let's wait and see" and "At the right price" options. I'm definitely not going to break bank to keep him but I wouldn't be angry if he's signed on around the same price as IT, Bradley, and Crowder are.