At the end of the day, what seems more reasonable? That they dedicate a lot of hours of developer time to design support systems for each healer that are fun to manage while also being unique, or they restore older systems/unprune DPS actions? The latter requires less dev time as the actions, animations and abilities are mostly in the game already for jobs that previously had them like Scholar. As much as you say you don't want to be a "GOD tank" and that you want the help of your healer, look at all the sustain and heals the tanks have gotten this expansion and see that what you're asking for is more work than what we're asking for. What you're suggesting would require complete redesigns of all four healer kits, retuning of all four tanks and also retuning encounter design to make up for this buff/support system to deal with during downtime. What we're suggesting would just require them to redistribute the potency of our nukes into a few more actions and things could continue as normal.
Of course it would be nice to completely redesign all 4 healers to be fun in a way that doesn't require us to push DPS. But encounters are specifically tuned with healer DPS in mind; it was impossible to clear E8S back in ShB without healer DPS. Given that, it seems more pertinent to ask for our jobs to have more to do what we're required by the fights to do when we don't need to heal, which is quite often. Bad healers will always exist; this is not and is never a good justification for our role spamming 1 button for most of an encounter.