Even being just 6'6", I'm not sure that Crowder can play SG full time. I don't know if he has the lateral quickness and speed to stay with some of the smaller guys. It would be awesome if he did, though, because we could have a pretty imposing backcourt of size, strength, and defense with Smart and Crowder in the backcourt.
He's still probably best as a sixth-man type coming off of the bench.