I kinda wish AST didn't exist. A lot of today's issues with healers is a direct result of the devs trying to make AST fit in. I know that is a bold statement, but one that continues to ring in my ears as something I perceive to be true.
I don't think any healer should have the ability to increase DPS in anyway. Not even their own. That's just one of the issues though. I have to echo an earlier post I read, and mention that any utility that doesn't increase DPS is deemed as inferior. It's unquestionably true, but it is also something I strongly oppose. Due to content design, you either have to give all the healers the ability to increase rDPS, or none of them. This just won't sink in with the devs though, even though they are the ones that design the encounters.
