I just have didn't like the farming on the winter version. This map was also a nightmare before the sleigh nerf as people would just swap to each corner if they felt threatened and would delay the round for so long.
I believe I used to champion for Summer Foxriver, due to it cutting the amount of farming servers with exclusively that map in the cycle, but I've changed. Summer Foxriver is constricting, with barely any land area to walk on. At least Winter Foxriver was more expansive.