Spiked Armor: The returned damage from this ability and its morphs’ now scales off a mixture of your Physical and Spell Resistance, rather than Spell Damage and Max Magicka, to help reinforce its identity of a tank ability.
Volatile Armor (morph): The Area of Effect damage from this ability now scales off your Physical and Spell Resistance as well, rather than Spell Damage and Max Magicka.
The total healing barely changed, it just got more steady instead of wild swings.
The current strong healing on not just dk and templar but every mag class comes a lot from how strong rapid regen is, and now vigor is in there too, so the overhealing is here to stay for now.
Also id be carefull nerfing magdk while everyone and their mother is running around in Vamp stage 3 for undeath. It distorts how strong the class really is.
As for PvE, there is a lot of classes already with absurd and reliable self healing while dpsing. Not much of a deal IMO.