I have several concerns about building around IT. First, we're going to have to pay him, and handsomely, to keep him long term. That will immediately limit what we can bring in around him to a degree.
Second, he didn't just learn how to score. He's been able to do that since he came into the league. He blown up in Boston because we don't have any other top level scorers and are featuring him. That's great IT but what happens when he has to share the load with others? We've already seen that in other places, and he was basically shipped out in Phoenix. He would make more sense as a sixth man but then how can you pay him max money. Or more to the point, if he's scoring 19 ppg then his defense becomes more difficult to swallow. Kind of a catch 22.
Third, he's 5'9". As great of a story he has been, he's always going to work harder than others to succeed. That will become more and more difficult as he ages.
I'm not saying it isn't a tough decision because our choice is to let him walk to give him away for something that probably won't approach what he does for the team.