Bronco has reached his ceiling...He simply can't keep on reinventing things. Football, like other sports are very simple components mixed with a complex human being. So, teaching fundamentals constantly will ensure the GREATEST growth for that human to experience. Then and only then will that human take those tried and true theories and add his/her flavor and viola, you have an athlete.
Core to that are always FUNDAMENTALS. They will NEVER cease to exist, they are the foundation on which ALL sports grow. Why this stubborn man can't figure this out is troubling. An educated man, with passion in what he loves to do, yet fails to grasp the most simple underlying components of them all. WORK ON FUNDAMENTALS and teach muscle memory.
Simply dumb in his approach. Childish in his expectations. Worse, he is a Div 1 head coach.