I'm not sure I even get what the argument is anymore.

La Femme has enough geometry in her face that any shape you want can be made from it if the included morphs don't meet your needs. You should definitely be able to get close to what you want with combining those morphs, spawn them into a new morph and then continue building up from there if you need to. A morph is not the base shape. It's a morph. You can use it as your own base shape if you want, and then build characters from that new morphed shape. The difference is that if you intend for others to be able to also use those characters then they would also have to have the morph you built them off of. There are other characters in the store(s) that work that way. One example is Anastasia and Shae. Anastasia is a morph of the Alyson base figure. Shae is a morph of the Anastasia morph. That means she requires Anastasia in order to look and work as intended.

But the zero base La Femme shape cannot be altered at this point without having to adjust all the morphs that exist for her, and that would just be ridiculous. No base figure is ever going to satisfy everyone. That's why we make morphs.