[KLHJ2]

All this does for a defense is reduce the amount of hand signals used in a game. As far as the coach on the field theory is concerned; the communications device is cut off with 15 seconds remaining on the playclock.

When you think about it is not that much of an advantage unless your opponents are stealing signals. This potentially can really screw up a defense with poor personnell management skills. I look at it as more of a defensive disadvantage.