Not sure if I've heard that some of the ret paladin spells are getting changed to physical melee. Could someone throw the source up here?
Thing is, since it's completely(?) physical, maybe we can get some testing for Armor Pen done as most of the ulduar gear has ArPen except our tiers. Currently, it is not recommended as our spells are holy dmg.
Edit: Don't think Exorcism is physical though. Just remembered they are changing the type of dmg our Judgements do.