Thanks for the suggestions (and encouragement) about how to do my doll's face. I ended up painting a very simple smiling face, and it was so much easier than I expected. Easier than embroidery for me, because I have lots more experience painting than I do embroidering. I also added some pigtails, a skirt, some ribbon trim and hair bows. And little felt shoes...
I was really surprised at how much personality adding all these things gave her. And I love how she has lots more of a rag doll vibe going on now.