Sure give Heacock credit for making the change. But at the time personnel dictated the change and allowed ISU to get it's 11 best defenders on the field by going from 4-2-5 to 3-3-5.Jon Heacock implemented a completely new defensive scheme in a bye week before we played Texas. That was his successful and still used 3-3-5 defense. So yes, in-season adjustments can and do happen with the right coaching.
But what changes would transform our offense? We don't have a better OL combination, injuries have limited the RB room and how do you get a QB to throw fewer INT's?
Sure the play calling could be better, but not sure that would fix most of our issues.