Hehe, DPS messing up and dying means it's the healer's fault 99% of the time for some people.
I wouldn't call the AST bad. I've saved runs on my AST, runs that went bad not because of me but because of the others. I'm mainly talking about the last boss of Fractal. What a horrible nightmare. After 2 wipes because the ninja wasn't helping the BRD to kill adds, the tank (don't know how) eating up the mines and whatever else they were doing that made me have to heal those 2 individuals more than usual (The BRD was the only one I trusted lol), the tank got one shotted and I thought "Here comes 3rd Wipe", I was like "NOPE NOPE". The boss went after me, I tanked it for a few, cure bombing myself until Swift was up, then raised the tank and victory ensured afterwards. I was lucky enough that I had used LA earlier so I had sufficient MP to afford a raise, curing myself and then keep on with the last 30% of the fight.
Of course when a DPS dies it's easier to blame the healer =.=; specially an AST, because they know that they don't have to put as much effort with a WHM/SCH since they will be there to cure through their mistakes.
I always get commendations on AST, I've saved runs, I've healed "I'm too cool for protect, gonna pull a huge pack of mobs without it" paper tanks without letting them die, I've done speedruns fine. That is not the point though. The point is it would've been less stressful for *me* had I gone WHM. That way I know that if people mess up (and they most probably will in DF >_>), there's higher chances to avoid a wipe. Whereas on AST, even if being able to heal "fine", will just give me huge headaches. I am sure it is the same with SCH, less stressful on that job that on AST. That's when you can clearly see the imbalances. Yes, it can BE done and you will only notice the struggle when people keep messing up everytime. Basically it feels like AST is missing level 50 to 60 abilities that would help it sustain. It's like if you went in with a lvl 50 WHM without all their 50-60 abilities (though... the monster divine seal and regen would probably be enough lol).
And that's just dungeons, don't get me started on Savage again... ._. yeaaaaahh, if everyone in my party played at their best, I could probably do it as AST, but that's not happening anytime soon. I'm stuck on WHM for the time being. =( I decided to make the change, not my static, but they would've probably told me at one point anyways. Remember what I said about curing through the mistakes? ...Yeah. Less stressful on WHM, I only do it for my health and sanity!