Bama does not want them to hire Muschamp as DC. He's a good DC, and will get a lot more out of the very good Defensive talent they have been recruiting than Ellis Johnson did.
Not very concerned. As long as Bama takes care of their own business, I and others have no reason to be. As long as Auburn's coach is not named Nick Saban the Tide is in good shape. While they're exceptions, defenses at schools that run that fast a hurry-up offense as Malzahn's often seem to have a tough time. Besides, Bama recruited exceptionally well last year, and for the next, at the OL position where they had fallen off since 2012 and have recruited well at the offense skill positions.
While Muschamp is a very good defensive coach, and has personally learned from two of the best in Bill Oliver and Nick Saban, and I can think of other coordinators I would rather see there, his work would be cut out for him at Auburn but will certainly help them.
BG