What has Primo shown that remotely suggests that he has all star potential, much less the highest ceiling of the 6? He doesn't do anything particularly well, is a "shooter" who shot well below the league average, isn't athletic and doesn't get to the line. He projects to be, at best, a bigger Patty Mills with a modi more defense.
He was an absolutely atrocious pick at 11. It's ok to admit that. Suggesting he has a high ceiling, much less the highest ceiling among the rooks, is some high grade copium.