I think he could not only be a player, but I think he could be quite special and be highly impactful, much like what Timelord has shown this year.
Timelord fell because he played in a two center system in college his 2nd year with a horrible college coach, and more importantly, due to medical questions. Now, his third year, things just gelled, the game slowed down and he showed the type of stud he was in high school and his freshman year in college.
Romeo fell in the draft because of medical reasons and questions regarding his shooting in college. But his shot was effected by wrist problems that he played through for a year rather than get it fixed. But now, those wrist issues are gone. If he gets his shot back to the way it was in high school, with his raw talent, his BBIQ, his athleticism and his physical attributes, much like Timelord, he could explode onto the scene next year.
I have confidence he will. I think when we look back on Romeo, time will show it was another great Ainge draft pick.