From the new 5.2 patch notes....
So it deals the same amount of damage doesn't trigger the atonement heal, but now delivers the same heal anyway.....For Holy and Discipline, Power Word: Solace replaces Holy Fire. It deals the same damage, and interacts with other spells and abilities in the same manner but does not trigger Atonement, is instant, costs no mana, and restores 1% of maximum mana on each cast. Damage dealt by Power Word: Solace will heal a nearby friendly player within 40 yards of the target for 100% of the damage dealt (50% when healing the Priest).
Isn't that changing something to work exactly the same as it did before? Or am I missing something?