Hi there lestdog,
You´re doing an awesome job already, and guest what, i also did a similar character quite long ago…a kinda dollish lil´girl 
here´s an image, and i´ll tell ya what i would improve…

1/ cheeks ; need to be more rounded, en lifted up, that will make here, happier, younger, and nicer…
also, the fatness of the cheeks should pregresivelly disapear at the corners mouth, in your profil view y see, there´s this fatness going under the mouth, that´s just for oldies…get images of(if you havent yet), of lil´dolls face, and you´ll see what i mean…
2/lower mandible ; rounder and softer, again these are the rules for cuteness, she doesnt have a lizard mouth right, she has an small cute mouth, so is the mandible, in your model the mandible bone defines de form, that should be rounded by fat…
3/wings nose ; looking from the side view, and this is very very important, take these wings nose and move them (from side), inside the head little more, look at any profil, nor any in the world have the wings nose end at the same vertical line that the starting of the upper lip…
this image probly shows it better 

4/ down part of the nose, modulate her forms in a way that the middle of nose and the wings doesnt fit on the same plane on the y axes, normally the wings are little up…
Ear is just great, maybe make it softer, or simplier, but thats just preference…
Hope any of these, serves to you in some extent, its just my opinion, but its supossed that i´ve studied all this stuff 
great work, keep on
ciao.