If you look historically at the careers of the 39th pick in the draft, it paints a very, very bleak picture. The career average of 39th picks who actually PLAY in the league is something like 3.2 ppg, and that doesn't include the guys who never suit up for a single game. Of course, every player is different, but the bottom line is that teams rarely ever invest the time to develop guys picked that low. I hope Grant develops into an NBA player, but the road ahead as a 39th pick is a hell of a lot harder than it would have been if he was picked at the end of the 1st round.
Reading through the scouting reports on Grant prior to the draft, it is very apparent that his shooting really hurt him. One report I read said that his mid-range shot percentage was near the bottom of all the players that the team had brought in. This is an area that could possibly have been developed by another year in college, but it is doubtful that an NBA will sit around waiting for a 39th pick to develop it.
Again, I really liked Grant's game and you saw amazing potential at time, but the very raw nature of his skillset apparently overshadowed his upside athleticism in the scouts eyes. I'm pulling for him to be an outlier and make in the league, but it would have been nice to see him in Orange next season.