First and foremost, my apologies if this topic has been brought up before, I did a quick keyword search and did not see one.
I read the forums on a regular basis and see a lot of frustration about healing, self-healing, healers not running out mana, etc....Whether or not that frustration is justified, I don't know. But what I do know is the developers are trying to find a way to make mana more of a finite resource. It's something they attempted to do in Cataclysm and something they are working on in Mists.
Resilience is, in my opinion, a great stat: damage reduction is a wonderful thing. However, by default the amount of damage you put out is reduced because the opponents you're facing are wearing resilience too. In other words, more resilience equals more survive-ability, but the trade-off is less damage (assuming your opponent is wearing resilience as well). To be clear, I don't have a problem with this trade-off.
But I am curious as to why healers don't face the same trade-off.
Maybe the developers could implement a change to resilience, so that it not only reduces damage received but also reduces healing received (though, not at the same rate). Would this make mana more of a finite resource?