I'd love to see more NPCs discovering and taking advantage of the MC's new submissive nature. Employers and roommates in particular, could encourage certain behaviors and require more outfit changes. It may be cliche (or not), but it's always fun when one person forces the MC to make a feminine adjustment, then another person thinks she did it on her own and must like it, so they help her along or make more changes, and it spirals out of control.
Maybe I just haven't seen it, but an expansion of her chores list as a result, adding cooking after she cooks enough meals for the girls, requiring some of them to be done up to every day, perhaps...