I was thinking of something but wouldn't it be something if Ashe was one of the boss battles in chapter 5 of the vampire route. I mean she wasn't able to keep up with her as a human. Maybe as a vampire and a fully fledged one maybe Mila could be more of a match for her- granted if you level up. Same battle like Dorian minus the whole transformation thing
Just something to think about- maybe you could inculde something like this in?