I've done well as an Astrologian in the new content (dungeons, not raids and primals) overall - the one place the class seems to suffer most is high burst when the party is taking a lot of AoE.

But...I will agree with Dortharl, based on my own experience, that my old main (SCH) which I'm now leveling instead to 60 just feels a lot more comfortable to heal with. I'm not a theorycrafter but to say as a SCH, fights don't drain my HP as much, I have more time to DPS, and I feel I have more direct healing burst tools that pack a punch. This is a terrible shame, because I really love the concept and mechanics of the AST.

The one place in the new content I thought the class shone was in Neverreap on the last boss - Lightspeed has done a lot in that fight that I don't think my SCH could have done as easily. But until AST becomes more dependable, SCH will be my main healer. I have faith that AST will get more tweaks in time...when it does, it'll be my main again.