Best of luck to Roby and honestly I think this was the best decision. He is moving up mocks and could easily be a late first round pick.
He could maybe improve a few things, but I dont think another season was going to change much. On the flip side an injury or struggling to be dominate in the offense and another year older wont help him.
He has proven the physical traits are there. Yes, he might end up in the G-league but I could also see him earning 10 minutes a night on a teams bench and improving.