Earlier quoted context omitted.
Shogo had a mod called Squishie where one player was normal size and on a team by themselves, and all the other players were tiny and on the other team. It was the most fun I've ever had at a LAN party in those early 00's. I'm surprised no one ever picked this up and turned it into a real game. https://www.moddb.com/mods/squishie
I assume those asymmetric multiplayer games are hard to maintain an audience. Everyone wants to be the super charged monster, nobody wants to be the squishie. Unless you can shore up the difference with bots, you are going to have to play dramatically more rounds as the less-fun squishie.
The heroes on the other side are largely over powered compared to the standard trooper. While everyone wants to play the hero, it takes time to build up points to switch to it. It allows every odd character models, where we have bb8 running around quickly and extremely small hitbox.
I do think there are opportunities in this area. When I play fortnite I get disappointed that everyone has to fit into a specific skeleton. Let games be weird.