I get that. That's where you have to have confidence in someone's coach-ability and dedication to their craft. That has to be based on feedback from previous coaches. You gotta be sure if you're taking a CB at No. 8.
Many guys try to get harder coming in. If he can add some weight, and strength, it could be a risk worth taking. A few extra lbs, and NFL conditioning take hold, and a star emerges with a major chip on his shoulder. Then you'll look back and say how wrong you were.