One way to judge the performance of a leader is by the quality of the people he/she hires and keeps. Maggard has excelled at that. The most recent proof is that Napier is staying. We don't know all of the ends and outs, but, by all reports, it was Napier's to lose, and he decided to lose it.
If Napier was not very satisfied here now and what he sees for the future (which is largely a reflection of Maggard) Napier would be gone now. While Auburn might not have been the perfect job, it is hard to turn down $5million a year or so. Even if Auburn had not turned out well, Napier is still young enough that he could have had a second coming, a la Kiffin and been financially set for life in the process.
I believe Maggard is a large part of the reason we still have Napier, not to mention softball, baseball, vollyball, and soccer.