I finally spent the time to learn hair grooming in Blender well enough to update this project. I was really unhappy with her hair for a long time, but I'm much more satisfied with it now.
I also took the opportunity to make lots of small adjustments.
The original upload: https://www.artstation.com/artwork/JvrPgZ
(I may re-render some of the other angles / new angles now that the hair is updated, too, but for now I'll leave it at this.)