You know, I hate this with a passion - it kills tempo, as you say it takes all initiative away from the players on the field, and it just looks dumb when six players all stop and stand up and stare at the sideline for 15 seconds.
I get the idea in theory (the coaches see how the defense lines up, then gets adjustments in from the sideline), but it never works for Iowa State in practice. Instead it always seems the Cyclones hit a decent play, get the defense back on their heels and unprepared, then the coaches take all momentum away by having the team stop the game to look over and get a new play call sent in, which always seems to be shifts by the tight ends, putting the slot in motion, and handing off up the middle for a half-yard gain.
If the theory worked, seems like you’d see a lot more instances of Iowa State taking advantage of a bad matchup or a defensive misalignment to break off big plays after the coaches adjust from the sidelines. Has that ever happened?