From the livestream it seems the protection paladin gets a block with 360 degree cc immunity and 60% DR but the 20% you lose compared to a GF gets added to nearby allies, also it slightly heals.
Shift is all paladins create an zone around them and are immune to cc get 30% dr team gets 10%dr and heals all within Devotion gets a 500% bonus to shift heal Protection gets 60% DR and 20% DR to team