Some good points here. But I would say this. Even those playcallers that do that, don’t do it all the time. Usually a critical down, or they get a “tell” about something at the last moment. But they don’t do it every down. If they do, they are micromanaging imo. It also shows that you aren’t teaching enough. You don’t see NFL teams doing look at me at all.
You are right that tempo is a key. I would practice it a lot in practice because that’s not something you can employ unless you are well versed in it. Then you just running around like chicken with head cut off. You can be methodical calling plays taking time off the clock without look at me too.
Our issues are more than just look at me. Its play design and calling appropriate route concepts based on the strengths of your players and the weaknesses of the teams youre playing. You should know all this before the game.