I definitely agree with you in the area of "working showers" and "new hairstyles" - in fact, I was just about to suggest them myself until I ran across your thread. As far as walls go, I know the mods 'Snap n' Build' and 'Homemaker' have a couple nice building materials, including brick walls, greenhouse walls, bunker walls, warehouse walls, etc., so you might want to check those out. (I realize this is an older post, so you might have already discovered those mods by this point) But yes, working showers, or at least tubs, should be a thing. Maybe they could give you a bit of a healing bonus or a small, limited-time stat boost to give it an added purpose? (Charisma? Intelligence?) The ability to at least spawn a couple cats around your settlement would be a nice feature, too, as in my opinion a house isn't a home until it has a cat. :)
