Pulling a scholarship offer isn't that uncommon. Happens all the time at big schools (including Creighton). Difference here is Miles waited to do it after the AAU circuit was over, costing Arop the opportunity to impress coaches from other schools and thus severely limiting his options going forward. If they'd cut bait in June, this would have been a much smaller story, and it's unlikely his high school coach would be (rightfully so) scorching the earth with venom.
That coach isn't just some random guy, BTW. He's the father of one of the greatest Nebraska basketball players ever. So not only is Miles torching bridges with high school coaches in his state's biggest city, he's torching bridges with his own program's history (what little of it there is).
Miles' days are numbered in Lincoln, I think. Which is too bad, really, because I'm just starting to like the guy