It makes me wonder why they didn't have other types using different abilities. Sand Rush has a decent few non-Sand-type users by comparison, I wonder why no Snow-using non-Ice Types have been tried (like maybe Sneasler or Winter-Form Sawsbuck could get Slush Rush or Snow Cloak or something) in the same vein.
I griped before about Sawsbuck's forms not being differentiated enough but this would have been such a great way to do that: having each form have a different weather ability. Obviously Slush Rush didn't exist back then but Sand Veil, Snow Cloak, and Chlorophyll all would have been fine in Gen V - might have needed a new ability for Rain, though, as I'm not sure Rain Dish or Swift Swim would really have worked on a deer (yes I know deer can swim, but still).
Like cosmetic-only forms are fine so it's not a major loss but it does make me wonder if there was ever any intention to link the seasons with the weather. In B2W2 N battles you each season with a different weather team: Hail for Winter, Rain for Spring, Sand for Autumn, and Sun for Summer. Nowhere else are the four main weather effects so explicitly paired with each season so it might just have been coincidental, but it did make me stop and think.