I've said this a few times. I HATE that he is in the booth. If that energy is what everyone says it is, then it's infectious and translates not only to the D but the O as well. It can infect the entire team. Additionally, I think there is a disconnect from the booth to the sideline, especially defensively. On offense the QB has to recognize the defense then communicate. On defense, everyone needs to recognize the offense. So when a QB and OC communicate to breakdown defenses and adjust it's easier than a D.C. Trying to communicate with an entire defense. I personally think Diaco would be more effective on the sideline with a white board. He needs "eyes in the sky" but more to confirm what he thinks he's seeing, than tomactually direct the defense.