There's absolutely a fundamental disconnect between the the way the job designers feel that healers should be played and the way that the battle design team incorporate healing into their fights.
The job design team seem to take a step forward with things like the current Lily system and Macrocosmos, but then completely and inexplicably drop the ball with things such as forgetting to update said Lily system with Endwalker's increased level cap and Glare III.
Be it ineptitude or just being stretched too thin, I've got no hope of them fixing things until either Yoshi/SE get start writing cheques and hiring or key people start getting replaced.
Healing is going to continue it's slide towards increasingly unanimous negativity until either the job or battle design teams makes a significant adjustment IMO.