I've seen him being drafted in the late first round to being undrafted in mock draft's. He needs to obviously develop his PG skills more(ballhandling, limiting his turnovers, developing a crossover/blow-by move, distributing the ball). One thing I've noticed with Dre over the two years he's been here is that he has good straight-line speed and good leaping ability, but he doesn't have great lateral movement. That causes him to struggle staying with his man on D sometimes, and it also limits him a little on offense by not being able to consistently get by his defender.
The good news is he has two more years to work on those things. He already burries NBA range, 3's on a regular basis and has no problem hitting step back 3's off the dribble. He also consistently steps up in big situations(Big Ten Tourny and NIT as a freshman, NCAA Tourny last year). He has plenty of things going for him to get drafted, and if he can improve his PG skills, I could see him being a first round pick.