He is a classic 4 year player in the Scotty Reynolds most. He might test the waters because after all, it's free to do so. Leaving would be insane. You need to be Iverson or Wade at that size to get drafted in the first round.
After that, there are several dozen combo guards who almost always land in Europe.
Eh, Poison? I get the hyperbole, but in the last 5 drafts Brandon Jennings, Eric Bledsoe, Johnny Flynn, Avery Bradley, Ty Lawson, Kyrie Irving, Steph Curry, Jeff Teague, Darren Collison, Aaron Brooks, Rajon Rondo, Jordan Farmar, Shannon Brown, and Quincy Douby have ALL been drafted first round "at that size" or smaller....