Basically our two most successful NBA players the past 30 years, Kurt Thomas and Kenny Hustle...both probably could attribute their NBA careers (to this point for Kenny) to the fact they played 5 years in colleges.
This allowed them to significantly develop and join the league as grown men basically. If you have a 5th year...take it...especially if you are a marginally talented player.
RJ should come back, develop, enjoy the free room and board, the girls, not paying bills, etc. Dude in 12 months would be in a much better position to go somewhere and play.