An overhaul of the tailoring and dyeing system.
Such as better/actual in-game ways to keep track of what was tailored, how to tailor it again, and maybe save designs for either future event wearing, or dressing up mannequins with. Plus, in-game trackers for dyeing strength of items used for it.
Maybe even an achievement for tailored stuff.
Maybe also give eyes to the mannequins to make dressed up ones feel more personal and alive.
And if we happen to dress up in stuff that resembles or fully emulates the NPCs, maybe some dialogue reflecting that.