There's more than one way to win football games and recruiting elite talent is certainly an effective one. Not everyone can be Nick Saban and be great at both recruiting and coaching. Mack has always been a recruiter much more than a coach.
I am a Longhorn fan and see it the same way. Great recruiter. Maybe the best at that ever. For coaching needs good assistants and coordinators. Any success Muschamp has at recruiting, likely was learned from Mack. Coaching not so much.