He looks good enough to leave. And it's hard to see how he would improve his draft status all that much next year when the team focus will shift so much to the front court and the point will be better staffed.
So he should test the waters, listen to what the pros tell him, and if he is likely to get drafted at a reasonable spot, go for it.
I'm betting some team will promise to draft him in the 1st round, so that's probably what he'll do.