The main thing I have seen is his midrange jumper needs work. He has got to be shooting in the teens on those jumpers.
First time I can remember a notable decision to come back for a senior year that a guy has REALLY gotten better. Is Buddy big enough to get a guy like Roberson's minutes on the Thunder? Not really implying they would take him, just comparing the two skill sets. Buddy could really be an upgrade offensively...just don't know if he has the defensive versatility...although I don't really think Roberson is the defender he's made out to be.
Its rare to see someone like him stay 4 years. Everyone gets to benefit from him staying 4 years. OU, NBA, and himself. The NBA gets a player who is ready to contribute immediately and that will keep him the league longer.
Roberson is an elite defender. Plus, he's a legit 6'7". Apples and oranges.
If you believe Roberson is an elite defender, then sure. I tend to think he's not. With that in mind, does an NBA team with what amounts to a 6'9" SG really need a 6'7" liability on the court? It's just a question about where Buddy might fit in. I'm not sure he's a starting SG, but as a guy who's a willing/talented defender, could he fit into a team like the Thunder where he's actually capable of hitting a shot