Meh, what I mean is~
If a terrain obviously has more detail on the area surrounding it than the rest of it, it doesn't give the -free terrain- feeling, where you could easily be moving and stuff.
If you have about equal amount of detail everywhere, it will look better.
However, I'm not sure how you were aiming to do this.
I'll try to find the model pack, somehow, sometime.
Otherways I guess I'll have to say the atmosphere is quite good, and as it seemfully is day in it, you don't need extra lights added into it.
Then, the snowflakes... They somehow don't seem to be as good as they could be, adding several "holes" in the background, making it look like you've just made a wall of doodads and left nothing behind them.
Rating I would say... 7½/10
Edit: On a second thought... Let's give 1½ more points.