Chun's resume is pretty good, he likely learned a tremendous amount during his 15 years at Ohio State and his time as FAU and WSU athletic director. He made what seemed like a good hire with Nick Rolovich to replace Leach and then when NR went crazy with the vaccine, he hired Dickert who, despite the turmoil, has a winning record there with his best season this year (8-3, including an Apple Cup win).
I know a lot of people will say he sucks until proven otherwise but Chun was a pretty good hire during a very volatile time and one who knows the Big 10 landscape better than most due to his time at OSU.
He'll probably need to hire a new football coach in 2 or 3 years when Fisch leaves for the NFL or a Florida school so that's where he will really prove his worth.