That's actually an interesting concept--the main criteria being that Diagne needs to graduate before he can transfer to a D1. Since he doesn't have a scholarship anymore, the second factor would be whether he has the means somehow to pay for his own tuition.
If he does, then he'd be smart to get a full semester of credits in this summer, and another in the fall -- positioning him to graduate in December. Then, once he'd graduated, he'd be eligible to transfer, and we could get him in maybe for a week or two in December to start practicing.
No idea how practical this option is, but it would be an interesting add, and a way to flesh out the roster. Lots of unknown factors, though.