It doesn't have to be mi'qote with a J cup (besides, maybe someone wants the A cup). The system is already there. A variety of breast sizes already exist. The size is changed according to which face is selected. If only it was not tied to which face is chosen..
And it's not just about the breast people... This thread is about more character customization options. That is not just anatomy size but also different hair styles (4-8 max?), how the highlights are implemented (like you like how one highlight looks but you can't get the same high light with a different haircut) Could be make up or more things to set you apart like tattoos (yes mi'qote have them but again you can't do the combination you like. The face comes with a tattoo and you can't have a face of your choice with a tattoo of your choice.. it's either 1,2,3 or 4) that just is not enough.