This is really 3 separate suggestions: (1) Make other nade launchers (only STUN & EG needs this, I tested) shoot snowballs, (2) Make Molotovs deal damage normally rather than 15/15 hp/ap damage per pop, and (3) Make a TNT Model for the Christmas game tag.
In general moving this to be added later. We may also add a Christmas themed model for mines as well.