I think it would be cool it you had 3-4 battle groups in a mode. It would change things up and make it more interesting I think. I dont know how easy it is to do but in GB it has Charlie Delta ect. So i assume it might be built in. But the only problem I see is where to equally place the new teams, because the maps are rectangular. So maybe have the start points for it be in a square.

Maybe make it a BB mode so it is more gladitorial?

The reason other modes are not as popular is because exp so for this to work u would need to raise the exp.

This is just an idea maybe others can help modify it to make it into a great idea.