It'd be cool for sure, but considering how strong she is now I shudder to imagine how much worse it's gonna be once she has her full move and perk set. There's a non-zero chance that the jump to level 10 is a bigger buff to Kass than it is to us lmfao.
Like, lots of people have beat her, but so far everyone I've seen do it has had to use an incredibly specific build that only works under specific circumstances. "If she uses Dragon Breath turn 1 you have to reset" is in every strategy guide for the fight.