Blue Post...
"Since the release of patch 4.0.6, we’ve been keeping an eye on healers and how they are performing and are currently in the process of making some additional adjustments.
Priests
The cost of Power Word: Shield is being increased by 33%. While we wanted Discipline priests to be able to utilize this spell more often and with better results, we also did not want it to be the main spell (and often the only spell) used while in groups. We don’t find this to be a particularly compelling playstyle and have found that it encourages players to avoid using other spells such as Penance. We believe that using a shield in a tight moment is totally appropriate, but we don’t want it to be incredibly efficient to do so with more frequency than that.
We realize that by making Power Word: Shield slightly more expensive for Discipline priests to cast that it might cause Holy priests to avoid using it. To that end, we are adding mana savings into the Body and Soul talent. The tooltip will not reflect this change until a future patch, however. Ideally, Holy priests should not notice much of a change to the Power Word: Shield costs."
