Out of shape is the biggest reason. He is a shooter not a primary ball handler, and yes, not nearly the athlete that Springs was.Stull's stats at UWM compare very favorably with Spring's. More mpg, more ppg, better 3p%. Hard to know why his bigbten transition has been rocky.
We've learned from both Stull and Matz, and maybe to a lesser extent, Crandall, that grad transfers may not be all they are cracked up to be if the players are not really ready to graduate with a reasonable number of credits in the summer. Both Matz and Stull had so much academic work to do, they could not play ball and come in months behind in conditioning and likely other skill components. Six, eight or ten summer classes is a boatload of work every where but North Carolina. If they have so much academic work to do that they can't properly focus on basketball, is it worth it? Would we have been better off aggressively recruiting a Juco willing to be a supplemental player?
All that said, Akeem had a rough preseason and really didn't come on until the B1G season. I'm hoping the same is true for Stull. Not ready to throw him under the bus. We need shooting, and that is his strength.