I'm a Cane fan so I think I have authority to answer this question.
Morgan was one of the best LB ever to play at Miami and the most decorated defensive player ever at the school (at least for one season). His performance in Super Bowl XXXVIII was simply amazing (25 tackles) and he has shown promise. Unfortunately, he has been injured far too often to think he can take the physical punishment that is required to play such a role, IMO. He has the range and intangibles to be as good as Lewis though.