I remember a blue post telling that one of blizzard's goal was to abolish the group vision while in a raid (dunno when exactly). So in the future we won't be member of a group which is part of a raid but simply member of a raid. I'm ok whith this no problem.
Yet in 3.1 POH will be able to heal another any GROUP of your raid.
If i'm happy of this change i find it pretty disturbing and it's going the opposite way they announced.
I might have misunderstood a few things (as english is not my native langage) but i've the impression that blizzard whish to go east and then go right to the west (hoping azeroth is round like earth) and someday they effectively appear to us like coming from east.