There are those who wish he'd have stayed in Florida. They talk about his heading to Stanford and other displays of lack of Nebraska loyalty. Read around in other forums. I got tired of fighting with them.
As to his coaching abilities, I want to be honest: I really have no idea if he can do here what he did at UCF. Some golden boy types went down the tubes trying to right the ship at their old alma mater. Some did okay. I just don't know about him here. I don't exercise "faith" with regard to these things; I find that naive. What I do allow myself to think and hope for is plenty of time for him; say 4 full seasons with the 5th being the breakthrough one. I think by then we'll see what he's made of as to righting this Husker ship.