Unfortunately, I think there's too much of a belief that a coach can overcome significant gaps in talent and consistently make the sum way better than the parts. Some are surely better than others at that. But Coach K, Calipari, Roy Williams, Bill Self, Tom Izzo, etc. all need big time talent to consistently succeed. Crean may not be anywhere near those guys' level, but he has beaten all of them except K and he has developed plenty of future pros, including turning guys like Victor Oladipo and OG Anunoby into household NBA names from relative obscurity in high school.
Crean's best squads at Indiana had one thing in common, they all had numerous deadly three point shooters. At essentially all times, four or maybe all five guys on the court were threats from the outside. They spread the floor and moved exceptionally well without the ball. In some ways, that's not really any different than what most highly successful teams possess nowadays. Unfortunately, his squads always seem to have the same deficiencies -- an inability to consistently take care of the ball and inconsistent defensive effort/cohesion.
Sahvir Wheeler looked like Crean's new Yogi Ferrell, albeit a poor man's version (Ferrell was an outstanding shooter and a solid defender). While Crean got all four years from Yogi, he managed only two from Wheeler. The rest of the pieces haven't come together. Perhaps they could have as one commenter suggested. Had Claxton returned to pair with Edwards, Hammonds, Wheeler and Camara, I'm guessing Georgia wins five or six more conference games that season and is solidly in the NCAA Tournament discussion (albeit there was no tournament). Although it was still ultimately disappointing, last year did show progress. Unfortunately, the key players either didn't feel that way or they believed more surefire immediate success could come to them elsewhere. That's a shame.