Hmmmm, this ki aura idea is interesting. I do like the idea of players dedicating to different abilities to make them more unique. Adds more than “oh he’s just another Saiyan” to each encounter. Similar to adding the custom signature attacks.
I think the fighting styles started out as actual styles in real life, that gave passive abilities, but could only have 1 “equipped” at a time. This made players unique. Later we started to just want to add passive abilities so made them styles as well, because we either weren’t creative or it was just easy enough to slot them into the existing fighting styles mechanic because of how similar they were. Maybe we can rethink fighting styles, ki auras, passive abilities, etc.