Dude imagine at the beginning you're Kiryu a QTE happens and then you get to fight Kiryu as nishiki then another QTE happens and you switch back to Kiryu and then a final QTE ends the fight that would be badass final battle
Now that I think about it It feels like Dragon and Koi were based off of Kashiwagi's style which is kinda cool Though, I'd say that Dragon is the strength of Brawler and Swiftness of Koi combined
(Spoilers for Y3) A lot of moves are shared between Kashiwagi, Kazama, his brother and Nishiki, which is a very cool detail since they're all from the same family.
This might be late to ask but, how did you manage to get into Battle State during Free roam for testing moveset? Like there's no crowd blocking your way, no goons.