As a game announcer, I’d dispute that some teams made their numbers all that prominent! :rolleyes: It’s actually in our training to pair the number with what will help the crowd keep up with the action…but part of that social contract is that teams have to give us something to work with! I’d love it if every team had a sick color scheme or was loud about their sponsors or just had a neat gimmick. Instead, (and I link to one of my past robots because I’ve been guilty too), we ship plain robots. (We did fancy that one up in the pits, to our credit.) It’s something to work on for a lot of teams.
With the dancing, I see why FIRST generally does it that way: it keeps the energy level high versus starting and stopping as awards tend to be. Championship is different–more speakers force the hand, plus awards in the past–but Championship also has 100% of HQ’s focus, planning, and manpower to pull it off. The rest of us are amateurs. 
I do like using the scoring display for more timeout detail than the field timer can display. Alliance timeout vs. field timeout, perhaps a backup team countdown, things like that. I know most events I attend have kids dancing on screen during a timeout, so it’s not like it’s running over a sponsor roll every time–but if so, just block out a safe area and plan accordingly. Easy!
