I personally hate switching to Cleric Stance, mostly because someone always gets blasted in the face right after I turn it on. But without it I'd just be standing around picking my nose half the time. It gives you something to do when there's no damage going out.

I wouldn't mind if future encounters had less opportunities to use it though. As useful as healer DPS might be, it's mind-numbingly boring in comparison to the actual DPS rotations. I'd rather run around like a madman and play ping-pong with health bars.