Hyper breasts or penis depending on how good you can get the image generation... Maybe some regarding body types or even impacting the bodies of the npcs if that's ever planned. Could be fun to change them around too.
I've seen some AI art that can manage hyper sizes, of all kinds, just fine. So it IS possible. I also wish for hyper sizes. Big into bulging people with dick and cumflation, typical hyper stuff.
To a certain point I can manage to write stuff for it, but while I work with that stuff I have to be "Inspired" to write it, It will come a bit later this year after the foundatiojn is done.