I think the requests for a debuff healer is more to counter AST.

The HP drain thing was a mechanic of a popular WoW healer, and there was that Necromancer healer thread a while ago that made some really good cases for it.

I voted for a debuff and stance dancing main healer. Basically, what I assume DNC could become.

But, screw meta if it means things grow increasingly stagnant for the role instead of giving us more styles to tool around with.