1st image seems to not be lit properly, she has a (black eye), a reflector feathered in would have helped the shot.
2nd shot is same as far as lighting, before you go do HDR etc. I've learned it has to be a nicely done image to begin with so take the time to light her up.
3rd image looks like she is getting decent light on the face. Take the shot like you did and tell her to stand still and WALK around the subject and shoot. If you see the subject in good light take advantage of it.
Last image is flat lighting but you got rid of the racoon eyes/eye. Looks like you gave yourself enough room to make it a Vertical shot as well.
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Way to get out there and shoot , model has a nice look and you need to get the "headshots" as well.
Thanks for sharing and shoot well, Joe