I definitely don't think healers should be disallowed from DPSing. Honestly its really cool that in FFXIV healers are allowed to just wail on the enemy during downtime, and I think that is an improvement on the role. The issue is that healing in FFXIV has very little in common with healing in other MMOs, and healing in other MMOs is not unpopular by any stretch, so there is a large group of MMO players just not getting what they want.
Seperate healing resources already kinda exist, they just aren't used very well.
Aetherflow, for example, is a highly limited supply of intense healing in theory, but is undone by the fact that scholar heal spells are already low enough mana you can just brute force heal checks with GCD heals, so the resource is used almost exclusively offensively (in a way that also restores the mana you essentially only spend on healing spells as scholar). This is why I am not too sad nor surprised that Energy Drain is gone, energy drain as an aetherflow ability just kinda mucked up what Aetherflow was meant to be doing. You don't really spend mana as a scholar on offensive actions, you can cast offensively literally infinitely even while healing, as offensive spells are a net positive mana by quite a large margin, not even impacting your mana efficiency. This essentially means Scholars have two healing resources, mana and aetherflow.
If Senix wanted to do so, they could make the mana based healing less efficient for scholar, remove some mana regen, and you would have limited healing and unlimited DPS, which probably would be the change that makes healing interesting (especially if more incidental damage hits the team that pressures you to monitor multiple targets and decide between using single target highly mana efficient heals like physic, a mana inefficient aoe heal, and one of three big heal spells you can cast for free every X seconds.
This isn't what they have done (And while I think the changes made healing a bit less braindead it is still pretty braindead), so I am skeptical healing is going to get better, but it is not hard to imagine a system that maintains DPS uptime for healers while also making healing not an afterthought outside of high end content. That is really what is sticking in my craw: This is presented as a dichotomy between SE nerfing healer DPS and healers caring a lot about DPS, but for me as a healer main in literally every MMO besides FFXIV, I don't care about that all that much and more care that healers spend almost no time thinking about healing, how to do it well, when to cast what, how to manage healing resources, ect. But at least Senix is... very slightly moving towards where I want by doing things like nerfing Scholar a bit in terms of how comically trivial its mana situation is, forcing you to consider aetherflow as a healing resource, giving WHMs a reason to care about healing in terms of offensive power via the Black Lilly, ect.
I don't really agree with either side of the debate in this thread.
I like the state Square Enix is pushing the game towards more than people calling for scholar nerfs to be reverted. For real, while I like how scholar has a lot of cool reactive mitigation abilities, most of the people I talk to think its bonkers power level and versatility is just bad for the game, and I super agree, there was NO way Scholar was walking into Shadowbringers without losing some major aspect of its absurd power level. You literally can't make a fourth healer as long as scholar is a mana efficient mitigation healer with instant cast heal nukes it can cast every 60 seconds, pseudo regens in the form of manaless and actionless mantinence healing, and multiple instant manaless mitigation abilities, as well as having the top dps over time vs single target of all 3 healers. Like... it doesn't matter how high the skill ceiling of Scholar is, it just does everything you could want a healer to do besides provide raid DPS. Any time someone comes in and talks about how scholar is ruined and how great it was in SB strikes me as having very little empathy or foresight to the healer situation, and while I know YOU are not saying it, a lot of people here seem to think very disingenuously the status quo is not currently also a problem. At the very least now WHM has justification for existing by having better pDPS and sorta mirroring black mage as 'highest damage healer if you can pull it off but you gotta know the fights to maximize casting uptime' healer. Very nice mirror to its counterpart.
However, as much as I kinda generally like the state of the game Square Enix is pushing towards more than the status quo, I don't like it enough to want to switch to healer, so its sorta moot, and I think if it isn't going to actually change my behavior the fact I like it better doesn't trump the fact it kinda sucks for a lot of people. I would ideally just like healing to be interesting, but if that wasn't the case I would prefer healers to be happy more than things to be slightly more to my tastes despite not being my tastes, and I can definitely see why it is upsetting to focus on reducing DPS over actually making healing good (which would likely involve a NERF to how efficiently you can put out a full heal). Like healers enjoying the game is more important than an incremental change that doesn't actually fix anything, it just makes people happy with the status quo less happy while not making anyone unhappy more happy, if that makes sense.