I did the change you tell me and it look better
The model is smaller to match with the background. I did use the blur tool at 30% on some edge and put shadow/remove shine on the left side. I add a lightning filter on the right to match the background lightning. Also did put a cold filter on a layer with low opacity. Finally I did increase a little bit the snow effect so it show more even on a small picture.
edit: and a light 0.2 pixel blur on the model so it look more like she behind real snow
