You'd also think that he would have figured out enough things over four years for his team to want to retain his services.
Thomas would have to produce, plain and simple. Blair's production kept him in the rotation despite early season defensive lapses and foul troubles. Blair has demonstrated great ap ude and a willingness to accept coaching and he has noticeably improved in both areas as the year has progressed. Thomas will make some bonehead plays, but he'll have to play to his strengths, go get rebounds and block shots, and show the same willingness to follow coaching priorities that Blair has.
When you look at the worst case scenario with Thomas, you have to accept that he may never get it. Chicago passed on LaMarcus Aldridge to take this kid, paid him nearly 15M over four years, and is ready to let him go for pennies on the dollar. So in the worst case a change of scenery makes no difference and he follows Stromile Swift's career path out of the league. In the best case scenario, the change in scenery makes all the difference in the world and he blossoms like Jermaine O'Neal did in Indiana.