And, if those trips into the red zone that didn't have a TD resulted in a field goal, that would be a big difference. Also, if we had way fewer drives starting on our 5 or 10 yard line, the offense would be more successful.
The fact is, the offense (by looking at the stats) were doing their job pretty well of scoring TDs once they reached the red zone. Now, that also would have been much better if we had a competent O line that could control the LOS in the red zone.
So, fix ST and the O line, and the view of the offense would be way different by a lot of fans. And....if that would happen, we would have had way fewer games where the offense is trying to create a miracle at the end of the game in a 2 minute offense.
Imagine if the ST were switched in the Iowa game. The first several scores by Iowa were field goals and, if I remember right, some of them weren't short. Imagine if their coaching staff would have had the lack of confidence in their kicker like Frost has had. Those would have resulted in no score for Iowa more than likely. And....we probably win.
Edit to add: I'm not saying there weren't issues on offense. I'm saying that the scheme was pretty sound. If we could have a greatly improved O line and ST, everyone would have a different view of the offense and 4 coaches would probably still be employed.