I have been in far too many FPs where even healers in full 69's quit because of far too many wipes. I foresee a great deal of less people wanting to bear the burden of being blame for wipes (because they already were) and even less people will choose to be healers. This role is already by FAR the least played and less desirable role. It was ALREADY difficult to come across great healers let alone good ones.
Help me out guys, am I just having bad luck with the 55 FPs?
I promise you, those 69 geared healers rage quitting are not the good ones. A skilled 69 geared healer with low latency should be able to keep everyone topped off a majority of the time, or close to it. Try mezzing a couple of elites if things are too rough.