We have temporarily disabled Shield of Righteousness.

We’re working on the basic Prot rotations right now, and with Shield of Righteousness in addition to Crusader Strike, Hammer of the Righteous, Consecrate, Avenger’s Shield and Holy Wrath, there was just a lot going on. Shield seemed like the least interesting of those abilities — really Shield and Hammer just seem to be single-target and multitarget versions of the same ability, especially without block scaling. Shield also felt like a duplicate of Shield Slam, which doesn’t help in trying to differentiate the two Prot trees. Frankly, we’d rather make Avenger’s Shield and Hammer of the Righteous cooler than they are today.

It’s too early to call this a permanent change. We still have a lot to consider, such as the damage of Hammer vs. Shield, how different we want the AE vs. single-target Prot attacks to be, and how much Holy Power considerations occupy a Prot paladin.

If we keep Shield of Righteousness, we need to figure out its role relative to Hammer. We don’t want it to be just swap one button for another for AE fights, and we don’t want you to have to use both on cooldown since we are giving Prot paladins more things to manage in Cataclysm. (Source)