I think once you fix the heads, and /maybe/ make booby armour, nothing else is going to pass the 'amount of time spent shaving plastic vs discernable result' test. At least not for my money.
Maybe you could try to slim shoulders and bulk hips, but... do you really want want to be doing little bits of gs work when really a pony tail, slim face, and some sort of chest orbs is probably going to be all the signifiers needed to impart the idea?
I know you have far more dedication to detail and exacting standards for customization than I do in general, so I may be well off the mark with my assesment on this one.
Oh, and makeup and purses of course. But the former at least is all done in post production with the painting.
Do you have any pics of the bodies with the lady heads? When you show just the plastic bodies, I don't think they'd be all that bad as is... but its hard to imagine without seeing the face.