My main issue with Exum and the Jazz is that Quin seems to really distrust him. If Quin isn't sold on Exum then it just creates a situation where he's always going to be looking over his shoulder and not playing free. That's a really bad way to develop a player. Early on Quin was really developmentally minded as in giving guys minutes and letting them play through mistakes. But since last season he's kind of switched to a more win-now strategy for the most part (the exception is Mitchell which makes sense, and guys like O'neale who fit a certain archetype of being physical defenders). Maybe that's just Exum's bad luck that he got injured during the important season where he would have probably had the most chance to learn on the court in games that weren't incredibly meaningful yet. Maybe he can't recover from that with the makeup of the team now and needs to move on.
Either way this last stretch where Quin has slowly taken away his playing time and Exum's confidence has once again seemingly diminished just makes me hesitant to want the Jazz to re-sign him. Not because I don't believe that Exum could develop, but more because I don't get the feeling that Quin likes him as a player on this squad. Even when he plays him he still spends way too many possessions bringing the ball up the floor (maybe the worst part of his game) and then passing off and standing in the corner. This isn't Exum calling the "go stand in the corner" play because he's passive either. This is Quin calling plays that essentially make Exum a spot up shooter (maybe his other worst attribute). When he has the ball in his hands either on the break or in the half court he is a useful tool. He turns it over some but creates a lot of open looks in PnR and iso-blender plays.
I don't have a ton of confidence in Quin and Dante meshing at this point. If they do sign him I guess we hope for the best. A big part of that would be Dante really making major strides to gain Quin's confidence. He has to do that without ever truly having a consistent in-game offensive role which is a tall task.