Haha..
I don't play healer, so I won't really know, but from my impressions on last raids from a PF only perspective, the content is hard enough to heal...

So forum healers usually being on the more skillfull side (and also quite on the egotrip side lets be honest), all will disagree and say that the content is dead easy.
This is even more true if you get healers exclusively playing in a static.

However for PF the difficulty is well balanced.
Example, I've only ran once with a healer binome that didn't needed lb3 to pass harrowing hell.
Each and everytime lb3 was spent beforehand a failed bond 3 or w/ever, we would inevitably wipe on harrowing hell due to healers not being able to heal through, despite throwing all the mitig we, non-healers, could.
Or the speedo run.... boy did PF healers struggle with that.
There are so many moments I felt healers were just overwhelmed with the quantity of "regular" damage - not even talking about when people (and I) messed up...

Maybe they should add special achievements for people finding it too easy ?
They used to do something like that in WoW, in which if you did the fight with certain handicaps (not clearing certains debuffs or killing adds) you'd get an achievement.
There would be one or more for each boss fight, and upon completing all achievements, you'd be of course rewarded a super mount...