Oh wow, none other than the esteemed Alypia is quoting me; I am not worthy!
Correct me if I'm wrong, Miss Alypia, but I believe there are two separate instances of belly rating - raw belly rating, which is what is what is decided by initial physique choice, not affected by pregnancy/cum inflation and otherwise immutable (what we've been discussing here), and "regular" belly rating which is affected temporarily by pregnancy and cum inflation.
Now, I'm no code monkey, but from what little I can glean, I would imagine having these split among two factors as such should make things a little more manageable. Far be it from me to dictate what is and what is not manageable, however - if the coders say no that's the end of it.
But I wholeheartedly agree it would be a worthwhile endeavor.