Don't get me wrong he is a great player but he is anywhere from 50th to not even in Mock drafts at all. He will be 23 in November. Yes he has gotten better and improved but he is likely to end up making the same or less money than our players who left when fans considered them not ready. Basketball is not a game for these players it is their job. They make decisions because they are trying to maximize their earning potential, you can't have basketball as a job forever so the more years you can the better. Matthews after his senior year will be 24 at the start of his NBA career, if he lands with a team.
I wish him the best of luck, he is a great college player.