Good luck Mali. I didn't think he was a first rounder, but I am not an NBA scout, and I trust his sources better than mine. If he is likely to be a first, and is willing to work hard on his game, this is the right choice IMO.
NBA Teams have had good success with people leaving in the past year... just looking at players picked outside of the top 8:
Stanley Johnson
Devin Booker
Myles Turner
Justice Winslow
NBA coaching staffs don't neglect first rounders. In fact many assistants are willing to spend as much time as possible with you. After all, its in the best interests of the GM that the draft picks turns out. If you get a kid who is fairly mature, willing to put the work in on bis body (even with limited minutes), the NBA will take care of you.