Second this. It would be cool, but adding boobs took a long time because Kal needed to redraw Melo in every single previous art piece he was in where the boobs where available. It also meant every future art piece he makes needs a boob version as well, adding more time to the process.
Adding even more options and variations is just gonna clog development even further. This game doesn't have fixed character models that allows you to add cosmetics that can work in every scene. The characters are redrawn from scratch every time, because they need to be seen from different angles, have different expressions and do different poses. Cosmetic customisation is almost incompatible with this game.