I disagree with your statement that the OL is chronically inadequate. They’ve struggled, due to issues with personnel, as well as, imo, dealing with a situation where the old offensive schemes had become very predictable and relied on increasingly stricter levels of execution against stacked boxes who knew exactly what was coming. Especially against higher quality opponents, that meant the margin for error was increasingly thin, and we saw that in 3 shutout losses last year.
Correct - O-line is not chronically inadequate.
Not sure what you mean by stricter level of execution. Even plays with the best of design will not work if even one player does not execute his assignment. For example, a lineman attempts to block a non-assigned player, a RB attempts to run through a non-assigned hole, a WR/QB misreads the coverage. These examples of not accounting for correct assignments are what is normally referred to as lack of execution. In this way, a play is either executed or it is not executed.
I suppose there can be varying degrees of execution when all correct assignments are accounted for. Is that what you mean by stricter level of execution? For some positions, examples of this are easier said than done. For example, a RB is pretty much always going to run his hardest. A lineman is always going to block his hardest, although there is technique to master. Mostly, the ways in which a play, where correct assignments have been accounted for, fails in execution, are inaccurate and dropped passes. I don't see where scheme or predictability is really related to execution or stricter levels of execution.
The increase in predictability had to do with the playbook shortening to accommodate for a backup QB. The increase in 8-man fronts had to do with the ineffectiveness of a backup QB. I'm not sure there is any way around that. And that situation doesn't really speak to the effectiveness of a scheme.
Coaches within a conference end up knowing each other's plays/schemes for years. It's about personnel and execution. And we've seen that with a functional O-line, Iowa has been able to execute while being predictable, and execute against 8-man fronts. We've also seen that with a functional QB, Iowa has been able to execute in those situations.
In 2022 Iowa probably had its worst O-line I can remember in 38/39 years of watching Iowa football. In 2023 Iowa, for most of the season, probably had its worst QB I can remember in 38/39 years of watching Iowa football. If one is to judge scheme, it would make much more sense to do so in seasons prior to 2022.
Margin for error is always thin against top competition. Margin for error is always thin with a bad O-line. Margin for error is always thin with a bad QB.
Your obsession with scheme is peculiar. Of course, being predictable makes playing with a bad O-line even tougher. But again, that's the nature of the situation for any team playing a backup QB. The playbook does not expand in those situations.
Again, I use the example of KC vs TB in the Super Bowl. Reid is one of the best strategist of all-time. KC had no O-line and his strategy never had a chance. Mahomes/Kelce is one of the best improve duos of all-time. Their skill never got the chance. The following season, one of the best QB's ever, in Brady, had no chance when his O-line got banged up. This is not only simple analysis of these situations, that does not involve scheme, but these situations are very predictable in the first place. I know I made money betting TB in the Super Bowl, and betting against TB in 3 games down the stretch of the following season.
Of course, scheme is part of a recipe in which all of the ingredients interact. But for one's attention to be on the type of chili used in a taco seasoning, when there isn't any ground beef in the first place, doesn't make much sense