I've been mostly playing AST in FL and feast and I totally agree that they're amazingly strong compared to other healers. I don't think they need a nerf though. I just think the other healers need a buff. Too few already don't want to ever heal in PvP.

The changes to PvP have been very heavy on the damage. Even some additionals that helped to sustain were straight up removed. To compensate I think it's good that healers have more healing capabilities. AST seems like the perfect benchmark for this. They're still killable. Catch them in a stun with purify on CD and they're going to most likely die. Especially if it's followed up with a silence.

WHM and SCH just aren't in a good spot imo. If we're in a team fight and I go down and there's only a WHM left to heal, the rest of the team is likely going to wipe.

In conclusion, yes AST is strong. Please don't nerf though. Buff WHM and SCH. Thank you.