It was expressed repeatedly that developers saw how useless spirit was on mage gear. It was pointed out that they acknowledged this and intended to give mages *something* for spirit so it didn't feel so useless. They come up with this
-- Molten Armor now causes 170 Fire damage when hit for all ranks (Up from 75/130/170) and also increases your critical strike rating by 25% of your spirit.
Mage DPS is hardly going to be affected, however, is this best we can come up with? From a design standpoint, this is terrible. The long and short of it this: Spirit is still a useless stat and molten armor is half as good as it once was. Great work team! Now lets see how much spirit we can put on mage T8!