Zak nice shoots taken under less than ideal conditions. I took down your 4th image and played around just a little. I took the highlights down along with the whites as there is a lot of white in the image, this allowed me to move the exposure slider to the right about 1/3rd of a stop also increased the shadow slider to +39 this opened up the area of her hair around her face. Two things that in my mind helped was to adjust the luminance in the blues -23, darken his blue jeans up to help make them stand out more from the snow. The other was increased luminance in the oranges to +16 which improved her and his skins tones. There were some other little slider movements but nothing major.
These adjustments were how my vision of the image was taking me, we all have different visions hope it meets with your approval.
Cheers: Allan