I actually think you should tone back a little on the snow, and change the colors of the surrounding rocks/buildings darker so you get a nice contrast and framing.
Here's a random screenshot of uncharted 2 and skyrim, even their snow maps have really strong contrast, you don't actually get much shadow on mid day lit snow areas, so maybe a new time of day could be useful
[Blocked Image: http://wikicheats.gametrailers.com/images/9/9a/Uncharted_2_heart_of_ice_square.jpg]
[Blocked Image: http://2.bp.blogspot.com/-vSxC3UvtMs8/TtlAcun04SI/AAAAAAAAAP0/KOxWvFy3Kh4/s1600/Skyrim02.jpg]
Snow settings are REALLY hard to pull off without them simply washing out and thats not even the mention the gameplay
PS: the scene is really cool!