I had been a firm SCH and WHM mainly do to feeling safer DPSing on those jobs while being able to maintain party health. Once I started to see all these AST buffs, I took it out for a ride.

Ran Dun Scath (I know it isn't difficult) but even before these buffs 2 AST (myself included) had balance up I would say about 75% of the time with no healing issues and once Cleric Stance dies DPSing on it will be much easier. I can't imagine a scenario where 2 ASTs, even in the current state, would be out shined by any other combination of healers. Once these buffs hit, if they hit in their current renditions, there will be no contest. The other healers will be personal preferences only and simply will not be able to compete. AST really doesn't need these buffs and I think SE realizes that and will not implement them as they are currently understood.