Every OC Iowa has had the Iowa fans have said the same thing. Every one. As I said, time for BF to go and I am not advocating for him as a good OC ... but to not acknowledge other factors (players, execution, style of play that KF wants, etc) is why some Iowa fans complain about every OC that Iowa has had.
The whole style of play that KF wants will not generate high total yardage numbers almost any year. It just won't - people need to stop using that as a gauge for what Iowa does because it is not going to take into account their style. He wants a powerful defense that holds teams to FG's, not TD's and creates TO's by keeping the play in front of them with the idea that eventually the other Offense will make mistakes, a great ST that is good in all areas and controls field position and a great K that will be automatic on FG's from 30 - 50 yds when drives stall out, and a ball control Offense that will eat clock and not turn it over. They aren't looking to win shootouts.