Ball control is a fickle bitch
Nothing can remain constant. It has to revolve around the current landscape of the game, down and distance, turnovers, injuries, qb accuracy, rb ability, opposing dline play... Many more.
It's fluid. The best o coordinators have mastery of multiple formations and playbooks. Each set of four downs are a puzzle. If u want to be great you have to make decisions that flow opposite of what u normally execute. Special team formations, short yardage, long yardage.
It's exactly like what Hazelton did last year on defense. Be unpredictable. But u have to have depth, and an ability to teach players average schemes, and be able to teach fluid on the down calls. In order to achieve this, players have to have thousands of reps. Repetition with unorthodox play calling during practice.