There is rather complicated issue with all the demanded healer feedback sumrised. From what I saw there are two things demanded: more buttons and more reasons to push existing buttons. Main issue there, is that the two solutions are not compatible, and adding one will only anger the other crowd.

If content is designed in way that all the existing healer buttons that are completely useless in 99% of the actual game content are actually necessary in at least half of it - suddenly healing becomes complicated and hard at all levels, and of course, as we all know well, the one to get all the blame for failure even when its not actually their fault, is the healer. Now imagine how much worse it will be when it WILL be the healer's fault. And not to mention that old content will have the issues still, and only new content can be designed that way.

On the other hand, if the approach of 'add more buttons' for DPS rotation is taken... Well, I present a question of 'where the hell does it fit?'. Most healers have 2 full and one about 2/3rds full 12-slot hotbars of spells and abilities. Where the hell do you fit more? You could, say, prune existing skills, since, as said above, they're only really used in savage and extreme content basically... But then what becomes of healers in that content? The healing itself loses complexity.

I think that's the issue of listening to feedback given by people who almost exclusively play high-end stuff like Savage and Extremes. As someone who explicitly has 0 interest in grindstone that is Savage at the moment, I think healers have too many 'do nothing' buttons; but those buttons with their miniscule mitigations and stat adjustments do matter.... but only in Savage and Extreme. So you can't just remove them to make space for things useful and fun-to-use everywhere because of their importance in savage and you can't make them necessary to use everywhere either because that would raise skill floor of healers in general a lot higher, for a role that is the sacrificial goat whenever anything goes wrong.

Honestly, personally, I think current state of healer is 'fine'. Not insanely great, but also not terrible. There are a few skills I literally dont see reasons for existing (Ruin II....) that could be removed with 0 loss, but just not enough to make space for 'real DPS rotation' everyone demands; and I can't imagine any of the excessively loud savage-grinding minority being happy if all those 5% mitigation math abilities are replaced with something more 'practical' on simpler levels of content either. And making healer complex at all stages of the game would just mean less people breaking through the skill floor, which means less fresh people willing to heal, all while old healers who want something that just wont fit will inevitably remain dissatisfied.