Well for the sake of discussion it might not be bad to listen to other marching bands out there and see what you like. Hopefully the new band director (name escapes me but he's an ETSU alum) would be open to listening to things that fans want to hear during the games.
As much as it pains me, I do think one thing they should do is Sweet Caroline. Instead of the bah bah bah, they could train the crowd to say "Go Bucs Go." I just read where a bunch of area high school bands are heading to Chicago today to perform in the Windy City St. Patrick's Day parade, which is an amazing opportunity for them. The state of Tennessee and Southwest Virginia have traditionally had some great marching bands, and not just D-B. We'll have some great kids feeding that program.