Weather should be more interesting

I wish that weather did something other than just DoT a row, like maybe some kind of row-wide passive effects. For example, just off the top of my head with no regards to balance: frost makes all damage ignore armor, whenever a unit moves into or through fog it takes damage, rain makes cooldowns longer, cataclysm prevents the owner of the row from manually targeting cards, etc. As long as it's not the way it used to be more interesting weather shouldn't be game breaking.