Honestly, I don't even think it's just the state of healers at this point, it's just the state of the game becoming this boring homogenised "balanced" game coupled with the worlds most boring combat system I've seen in any game ever that's the problem overall.
Saying that though, I considered my self a main healer, I loved Ast before this patch, now it's incredibly boring due to nothing to think about with cards anymore, the game got "balanced" around "damage" and their cards in turn got neutered, I find my self pressing the same 1 button over and over and over for attacking and the majority of healing, which in turn means if the instance I'm doing is something I've done god knows how many times, the games "combat" does not carry this game at all, which means players like my self are literally falling to sleep during the run, the only time this isn't an issue is during savage raids and ext runs, which is a major issue when they're not exactly something you run very often.