Either ZoS didn't think about the implications of nerfing the Fire glyph into the ground (went from 28% in 1.5.8 to 3.4% in 1.6) or it's intended as a balance based on 3600 CP when you'd have max Fire resistance via Elemental Defender + Spell Shield & Thick Skinned, to a lesser extent. The latter is a very poor way to do it because it severely gimps DPS/Healers that are Vampires until they are very deep into CP, like 3-400+ deep. Tanking as a Vampire in 1.6 is very easy as reaching hard cap for Spell Resistance is reasonably easy in 7/7 Heavy Armor and using Major Spell Resistance plus Defending on your 1H and at least 1 Nirnhoned off-pc.Perhaps they wanted to move the resist from enchants to cps. However, I think when they said vamps will now take 40% fire damage no one thought they would have to use 3 times as many enchants as in 1.5 or dump most of their first cps into resistance in order to achieve that 40%.