In PvE, healers are basically doing the same thing, no matter what class. We stand around, trying to keep our mana up while we either heal the group or heal the tanks. Yes some healers are more towards DoTs and other towards straight and hard heals. What I'm looking for is some drastic healer changes.
I only have one idea:
The healer removes some of his/her own health to heal others. Then as an addition, this healer receives some Life Drain abilities (like the warlocks' but better) to heal himself/herself in order to continue keeping the raid alive.
It's farfetched, but maybe you guys have some better ideas. Post them all!