This is one of the dumbest takes there is. Coaches play to win the game. They're calling the plays they think will assist them in winning. Ferentz and Co aren't just watching the UNI game...they're pulling tendencies from the last couple years and video. Do they potentially have some limitations on the playbook with new players? Yes. Are they playing a base defense and only certain formations so Iowa can't prepare for them? Maybe in REALLY special cases (gadget plays) but otherwise anything that's been done during Campbell's tenure with any kind of regularity will be discussed in meetings this week
You’re right and you’re wrong, IMO.
Are they going to do anything radically different from one week to the next? Or radically different than what they’ve don’t over the past several years? No.
Does the staff have some wrinkles up their sleeve for this year? I’d hope so.
Are some of those wrinkles going to be held back for specific teams? Probably.
The coaches aren’t going to open up 100% of the playbook to game plan against UNI, and there not going to open up the whole playbook during that game outside of a desperate situation. I’d fully expect there’s a few things that are kept in the bag for some of the bigger games.