It's actually a stupid rule that I wasn't even aware existed. When I played high school football, someone would go watch other team play (please note I was second string on a team that didn't have a 3rd string.
I think you should also pile on being able to decode signals. In baseball when there is a runner at second, the catcher would not throw down a #1. Their signals were more complicated than that. Baseball now has electronic communications ... It was nice to see the NCAA finally doing that with in-helmet communication. Y'all can thank Michigan for dragging you into the 21st century.
Change and intelligence is hard for the NCAA to handle. I would like to apologize 1,012 times for Michigan's team winning games.