DoT effect against armor sounds nice, but not sure, if they can make it, that magic damage can cause an effect, even if there is still magic armor left to protect from magic damage. Or making a magic skill afflict physical damage against armor.
Type of Damage and type of Resistance Check are both separate from the actual effects applied.
Slowness is a good example of this, where if applied by an Oil surface, it ignores any checks, while the cursed Boots of Braccus will make an armor one(the effect is identical and doesn't stack).
Same thing applies to scaling and damage types, it's only the way it is because they made it so, but there is nothing stopping them, or a modder in the future, to make it otherwise.
