Through the preseason, really mixed bag so far. By far the biggest positive for me is his pick and roll passing, which is a lot further along than I was expecting. He's shown flashes of hesitating or working towards an angle to make the best pass and not always being go-go-go and hitting the roller if he's open. His catch and shoot J is much better than I thought (extremely small sample size) since it was a definite weakness in college.
His off the dribble shooting is about what I expected. Really comfortable going to it from his left hand.
By far the weakest part of his game: his dribble drive game, both driving and finishing, is going to need A LOT of work. It seems like he's even more reluctant to go right or use his right hand than he was in college, and he was already extremely left hand dominant then. Guards are going to shade him to his left hand and bigs are going to wait for the lefty layups and it'll be tough until he can make them respect the right hand.