The only actually useful talents for a Holy Paladin from the Prot tree is Divine Guardian, and to a lesser extent improved devotion aura. I say this because anticipation is a wash, since you can get the exact same damage reduction from deflection if you want it, and Improved Rightous Fury will not be able to be kept on in every encounter, or many for all we know. The reason Guardian's favor is also less useful in wotlk is because aggro will 'apperently' no longer be an issue. This means as long as your dps is not specifically trying to cause high aggro then you wont have to bubble taunt as often, therefore making this talent less than desireable in wotlk.Originally Posted by froop
Moving on, I believe the only real reason a holy paladin should spec into prot is for the "Oh shit" Divine Guardian talent. Admitadly, it is fantastic. But keep in mind that a minimum 17 talents into another tree is a lot for our new bloated trees for something like an "Oh shit" button.
I am not convinced about Improved Devotion aura from a healing point of view, since you wont be within range of the tanks anyway, and 3% more healing on ranged dps is undeniably small, since you always have to downrank your heals on their low HP asses anyway.
All in all, ret offers more whether it is simply conviction or if SoL fits your fancy more than BoL. If you are the one poor bastard that has to spec kings because your guild doesnt have any Prot Pallys, well shit happens.