Looks good to me. Spell development always slows down semi spell users, especially at low levels. Ceratinly, this Paladins faith is centered around a common enemy: The Undead. You might want to restrict Holy Wrath to usable against undead only. Possibly The Hunter too. This is not to say those spells WON'T work against non undead, but that the tenents of the faith demand the power only be weilded against undead. Should create some interesting temptations for our rightious paladin.
Besides, I have yet to meet a profession immune to criticals.