I think you should bring back the snowball canon from 2012 i believe.
Along with this I hope to see the snowmen killing for a droppable melee & hats like we did last year. maybe for the melee it could be an piece of a broken ornament or something along those lines. If anything add a side shop to the holiday shop that allows us to spend xmas coins we can earn from killing snowmen. (would include cars/hats/melees/guns)