How could you do this to AST?

[MintnHoney]

Well AST's base healing kit (ie Sects) have been a balancing problem from its release, and now they're finally dealing with it, so they DID acknowledge a problem and are working to fix it.

They didn't even say it was a problem, so, no, they're not acknowledging it was an issue. What they did say, was that they're going to "retool" AST into "more" of a "Pure Healer" in light of their push for the division of Pure vs Shield healing, so they're saying they're doing this as part of an exciting feature.

Furthermore, what that actually means for either Diurnal or Nocturnal Sect, as actions and as stances, is entirely up in the air still, so they may end up making something good, or they could end up making even more problems than they started with, not even thinking about what else of the job lore/fantasy they'll toss into the fire in the process.
I don't have any hopes for anything remotely grand to come out of this, so I'm waiting to be pleasantly surprised in this case, or not surprised, and therefore, not disappointed if their plans don't go so well. Again.

Did they ? I missed it

It was part of the Game Watch interview, where they asked a bit about the healer role split. There's a discord that provides great translations for these events and interviews, so I would recommend looking them up. You'll get a lot of news that way, too.
Here's a link to the interview.