It caught me by surprise. This level 84. I queued in the LFD as usual and started to heal the tank. What had already happened at level 82 and 83 was now very apparent: I was healing for the same amount, but at a very significant higher mana cost. In addition, the tanks had about twice as much health and played in a way that they needed it.
In my three runs yesterday evening, 8 (eight) tanks left before the end of the dungeon. Not because I couldn't keep them alive – I barely could. But because I couldn't keep the DDs alive and because I had to drink for about 45 seconds after each pull.
Now, in one way I love this. Finally the dungeons are no mindless zerging anymore. At least not for me. The fact that the DDs suck up so much damage is, of course, a result of them never avoiding any dmg if it costs dps. And who could blame them? Add a hundred itemlevels to my equip and I would probably urge the DDs to just do maximum damage – just like I did the last 83 levels.
I might try to record some 'good examples' later, but right now take this as an example: For about 81 levels my AoE heal would heal about 30-50% of a player's health. It was cheap enough to chain-cast it through most encounters – if I had wanted or needed to do that. Right now it heals for about 5% of a player's health and is too expensive to use if any overheal is involved. The same is true for most of my spells. They completely change their character at level 82-85.
On my third run I was kicked from the group – without an explanation, but I can guess why. If I weren't an experienced player, but a newbie, I am pretty sure that I would hate this game as a healer right now. The problem is not that it is (very) challenging: the problem is that everybody pities you – or is even annoyed by your equipment (by your presence). What is very challenging for you is not accepted as a challenge by them. It shouldn't be hard for you, but it is. If you use your cooldowns and most mana efficient spells in the best way possible - which is not easy - everybody seems to think that you are at least not letting them die.
This creates a very awkward feeling. Healers want to be liked. They want to be helpful. They don't want to be a burden. That is the mindset of a healer. To confront a healer with this level 84 is not very smart from a game design point of view.