Just my opinion here, but if I'm a GM picking in the back end of the 1st round, why not take a kid that has the talent to potentially be a lottery pick the next year. Makes sense to me, rather than waste a pick on a kid that doesn't have that kind of upside. Put him on your d league roster and develop him as you see fit.
If you're Mali, why wouldn't you want to take that opportunity. I know there is a money difference, but, that's his concern - not mine.
As a Cuse fan, of course I'd love to see him back. On the other hand, I hope he gets to league and blows up and makes every team upset they passed on him in the early part of the draft.
Because you can do better than just be a first round pick, look at Buddy Hield. He might not have been a first round pick last year, he comes back to school, and is going to be a top 5 pick.