As a former student at Rose Hill, I have to say they made the right move by not allowing him to move back a grade. Life is about progression, not moving back to play one more year(then another, then another).
If Walker struggled academically, I could see holding him back a grade, but even then, he shouldnt have been playing basketball if that was the case.
In all honesty, I hope every school Walker tries to enroll at in the 8th grade will turn him down. I dont know if there is anything against doing so, but nobody should cave into what an AAU coach only obsessed about making his record better wants.