A follow-up:
https://www.patreon.com/posts/link-85437365
I'm already a good way into making a new, better model. I hand-sculpted as many skin and muscle details as I could and converted to Udims at 4k instead of a single 4k UV tile, which shows way more detail up close, and no more dick join seam. It may not look like Gloria right now, but that is because this is a base model that I can later shape to be more like her. It should allow me to create more characters quickly this way.
The reason I'm doing this is because the current Gloria model has a few issues that will be a problem later down the line.
My biggest hurdles right now are
Deciding the best way to do Jiggle physics
Fluid sim and how to cover areas in sweat and "stuff"
Collisions for penetration stuff with the dick, like, should I manually use shape keys, or would some kind of cloth simulation be better
Clothes, even though most of the time they're off, would be good for giantess stuff
I might ask some other 3D artists and see if I can get some tips