Not a dis here, and also not meant to be an "excuse."  I agree on some of your points, for sure. Just a general comment.

The more detail there is in a base model, the harder it is to create character variations. It's much easier to add detail IN than it is to take detail OUT.

For example, take Sydney G2.  She seems (to me) to be of mixed ethnicity, reminds me somewhat of J-Lo. But it's really tough to get that look out of her, especially around the eyes. 

That being said, that is darned good sculpting work you've done there. Kudos!