I think  we have enough characters that look good until you get 30 degrees off the DaVinci pose.  We have enough neutered non-gendered people as well.  After having a chance this weekend to check out Dawn this weekend, I like are her jaw, her tongue, her toes, and to a degree her shoulder movement.  Did not like the bending of the legs and lack of polys in some areas, but hey its better than I could do.  I think I prefer the way V4 is cut in the hip/glute are as far as movement.

I think if you are going to go the effort with female genitals then just cater to those who need that.  Design the mesh and rig around the fact that her legs will be spread, or shell be bent over.  Better yet start with what people like and improve what they dont.  I like V4 she works well, I have found AMAZING textures for her, and any type of clothing you could want.  She is well supported.  However she is no porn star, textures go funny in the crotch due to the UV mapping and a lack of polys for extreme poses.  She wasnt designed for this so its expected.  If you could swap out her nether regions for new geometry that would make her perfect.  But then morphs dont work there, textures dont work, and DAZ wont let you share your improvements of their property.  Its a lot of work to not be able to share.  But then again a geometry switch would be nice, as long as it didnt retain any of the original geometry.  So I guess with enough thought it could be done.

Personally Im not looking to be a merchant and for 99 percent of my renders stock figure work well.  For that 1 percent I change geometry and textures to what I need.  Ill gladly pay so I dont have to do all the work of modeling, rigging and texturing.  Even if the sculpt is perfect, I dont think the limitations of the rigging would effectivly represent everyones needs.  JCMs, magnets, or multiple rigs would probably be neccessary.

All in all Id like to see figures become open source.