Yeah, it would be nice if those issues in houses/guild houses could be fixed (the bushes changing colour, and some of the snow showing through the grass areas).
Personally, I would love an option to allow our houses/guild houses to be winter-ized during these 3 months of snow. Personally, I would love for my GH to have snow tiles just like everything else. (But again, an option. As not everyone would want this).