Thanks Jon ... glad you like it .
Regarding the blues or cold appearance in the snow or the BKG in general ... is quite simple to explain and not a phenomenon as you say . It does all come down to the natural light and the chosen WB/ color grading in post production .
The shot was taken early morning with " cold winter light " in the shade , so I would expect it to be cool . In camera WB was auto , so the image will be really cool .... everything afterwards is down to me and my tastes or skills to identify the " problem " and leave it or remove it , actually quite simple . If I would have photographed the scene in analog times with my beloved Fuji Films .... you might have cried .... as the whole scene would be very cold and blueish way stronger than now in digital times , where we have full control over tone and color.
The limited DOF is just a result of the given lighting .... unless I stopped down with the risk of ending up with a blurry KF .

THX again Andreas