Once the next story chapter is done I will be looking into breast sizes. Not sure when you can expect to see them ingame yet though as I am not sure yet how big of a task they will be. More info will come soon.
Butt and hips though are much lower on the priority list and I have no info on if/when you will see that.
Unnatural hair colour is planned. But I want to make sure I have a solid foundation with the hair before expanding on it. Next release has a bunch of new hair and an additional ginger hair colour.