He shot 34% from 3 this season in the G League - not elite, but solid. Iowa had him play the 5, 4, and 3 at different times this season, and he seemed to be most comfortable and effective at the 4. That's my biggest beef with Minnesota - they never really let him get comfortable in one spot this season.
I do agree he has a long way to go if teams view him as a 3 in the NBA. His best shot IMO is finding a team who will let him develop as a stretch four. He's a bit undersized there, but I think he can overcome that with his motor.