Oh, go on then.. I'll let you in on something.
We do have plans to expand healing, but (as usual) it's down to finding the time to implement the changes.
At some point in the far distant future, healing will gain you more experience when used in battle. Consequently how monsters react to you healing things will also change, and we also hope to expand quests to include quests where you are rewarded for going to save creatures' lives.
These won't be happening soon, but they will go in eventually.
On the subject of "super healers" and "adventurer healers", we're also hoping to put in something along those lines when we split cleric.... oops, did I just say that too?
It's all part of the mighty long term plan, and even more mighty To Do list...