Agreed, the guy- diaco - doesn't seem like he's able to take a crap or brush his teeth without a plan, not that is a bad thing, when it comes to having the personality of a football coach, so I'm sure he's thought about his long term plan for a long time, and reviewed in revised it up and down three times in every direction, and he's sticking with the systems and plan he had for the season, and we are in game 3, of phase 1.
The key, is in games, in the season, during game time - the flexibility and being able to deviate from a plan, and still accomplish a goal, when circumstances come up that inevitably get in the way - like a daughter, or wife, in the bathroom taking forever when you need to take a crap, or a brush your teeth, for example, shiiiite will happen during a game, and you need to be able to adapt the plan, to overcome.
seeing the players improve is absolutely necessary, but part of the 'competing' I'm excited to see, is about the coach learning and improving too. Make decisions that give you chance to put points up and win the game. QB substitution patterns, definitely fits that.