I agree that using a dance team to expand the guard/supplement the show seems very smart. Ronald Reagan has about 40 guard and 40 dancers, which creates just an enormous presence on the field and is very effective. But they do have a guard, which uses equipment and does it very well. Vandegrift has a dance team ONLY, which barely uses any equipment. Are there others like that? What's the incentive for groups to go for the difficult equipment work if dance alone will suffice for very high visual scores?
The Austin band you're thinking of with a dance team is in fact Vandegrift, btw. They're called the Vision Dance Company or something like that.