I think you will find that in general that interest in football is down and not just NFL. It's a variety of reasons.
Iowa is not the only program frustrated with it's coach and it's not just about winning/losing. The cat is out of the bag and it's not going back in.
Football will be drastically different in 10 years. We have reached Peak Football and now starting to decline.
I could list 10 reasons, most completely unrelated to KF. Anyone who watched the Adams hits and the NFL response to the 2nd is frankly getting sick of it. Kinnick is a terrific venue. The Hawk football interest will decline gradually and sped up as a portion of the fan base gets tired of the fat cat at the helm. Explain away all you want about being young and we're only Iowa, but it doesn't take a brain surgeon to know how to play Iowa. Apparently OSU's coach isn't very smart though or completely arrogant.
Good guys don't put the thumb to their fan base.
Finishing my rant, Duke set basketball back last night, keeping in starters (one how almost got hurt), to a 40 point halftime lead and a 60 plus point win. What was the point? MK never once smiled or looked like he was having fun. The huge Evansville coach seemed totally out of touch like he was disassociated with ptsd. Iowa would probably struggle with Evansville.
There is just a huge disconnect period with sports and politics.
I watched the game off and only to watch the psychology unfolding.
Evansville didn't quit. They just absolutely could not get any traction inside. If Iowa were to make the dance, they'd run into something like that.