Check the official site's healer forums: people ain't happy. Now, I know that's not exactly the best gauge for these things, but when everyone is saying the same thing at once: I have nothing to do, I'm going to start playing something that actually has a skill ceiling and a semblance of something to do - that might be a good indication that you went a little overboard. Their suggestion that healers should be spending most of their time healing was a common refrain to pruning much of their damage or utility abilities - so how would that fit with their realizing that healers mostly use glare, broil, malefic? There's a disconnect.
Because they feel the need to appeal to hardcore casuals who probably do just spam healing abilities so they don't get yelled at by parsing neckbeards or the voices in their own head. This focus is why Monk has gotten a million different "don't drop Greased Lightning" buttons over the last 4 years, because it was to appeal to casuals who don't know how to maintain melee uptime before just axing the system entirely. It is why Blood of the Dragon's timer is basically worthless because you'd have to take a nap mid fight to drop Blood of the Dragon in actual combat in ShB. This paired with early HW where Savage was a meat grinder for anyone below at least moderately hardcore parsing neckbeards, creates this timidness towards really pushing the player base outside of Ultimate because when they did it nearly killed the raiding scene. Ultimates were originally slated to be 3 times per expansion, but they dropped that because they were concerned about pushing the community too hard.
Now those sorts of hardcore casuals probably do need to spend time using healing actions, because they're too timid to read into what the fight is actually doing, especially if their tanks are shit and think Sheltron by itself is an acceptable CD for a tank buster and think Reprisal on raid wide damage is an optional concern for them. But iirc when I had a raider friend check the minimum enrage requirements if you took out healer dps entirely from the later savage fights since around Omega, most groups would just barely clear them before the odd numbered patch if their healers didn't dps at all, they clearly balance the raids around healer dps to some extent even if they'd never fully admit it in an interview,
I think the disconnect is more so how often they try to enable or encourage better play patterns across the community vs what the community defaults to anyway, which might also be a cultural thing as I don't believe JPN has this degree of absolute shitter heal bots. Its why SE has made systems (Bozja duels are an example of this or Baldesion Arsenal) that from what I've asked work better in the more openly polite and better organized JP communities, vs NA where while yes a lot of people are fairly polite for an MMO community you also have greedy griefing shits and other various retards who don't give an absolute fuck about anything you do or say.
The ones that weren't doing damage when you had 2 DoTs to maintain aren't suddenly going to go 'thank god, now I only have 1 DoT to maintain' and start hitting buttons: they're going to stand still, doing nothing. So in exchange for ripping out the ability for better players to try to reach an actual skill ceiling across the entire role, a bunch of curebots continue to do exactly what they did before and a lot of good players picked up other roles. That's why I don't think they've really got a great handle on how this shit actually plays out, and are instead working on a pretty skewed vision of how the game itself plays.
I get that there was an issue where parse trannies were ignoring healing a group to be assholes and get themselves a shiny parsie, thus forcing the work entirely onto the other healer. Problem is, they still do that - except it's even easier now, and the solution remains to call them out and kick them. Just now everyone else -also- has to be bored out of their mind.
If I were in charge I'd have ARR-HW Cleric stance still be an ability and just make it not as stupidly clunky to use, but I am not and SE is. I like Yoshi-P for the most part as a director and generally respect him at minimum, but he is a massive pussy when it comes to healers. He outright refuses to ever state that healers should be using dps outside as a soft suggestion at best, because he knows this community would shit absolutely bricks if the director himself acknowledge green dps is a role and not a suggestion. Their entire issue regarding healers is just backwards because they refuse to just state what they want healers to do, so they do this mega half assed shit because they want to appeal to casuals who unironically quote the Cnj npc who goes "I am good at healing you can't make me do those other things!" and various other "You don't pay my sub" antics.
I don't agree with their shitty solutions, I merely am trying to communicate them because I think they know more then they let on because they generally know the issues for every single other role and can generally compromise and fix issues, but healer is just impossible for them to get fully right for some reason. Healers aren't that hard to figure out, they might not like it but they do know what healers do in this game and have since Final Coil. The refusal to act is not the same as the inability.
They pruned everything down, not just the Sch. The upswings for some of the pruning you can see in the Ast - MP on card draw is good, and some of the cards were pretty useless. The downswing? Well, now there's really not a lot to do on the one healer that at least had an actual minigame to keep them busy, where the big challenge is now remembering 'ranged' or 'melee' and that's it. You could argue it always sortof went that way in that you'd fish or convert cards as necessary to bring it there, but those extra steps were the kind of wiggle room players looking for a challenge could get into.
This is a separate issue, but there's a reason why halving the potency on Summoner's tri-disaster is a better change towards balance than saying 'ok summoner, we have simplified your rotation to the point that a retard can play it while undergoing a seizure'.
They have pruned every job down ever since Stormblood's release. That is how they justify adding new actions next expansion to avoid too much button bloat (a fair enough concern tbh, have you seen Paladin's hot bars?). Samurai lost Hagakure before they re-added it because they didn't fully realize how important it'd be especially for Tsubama Gaeshi timing. Dragoon/Monk/Ninja has been missing a dot for 4 years now among other things those jobs lost. Tanks got their entire enmity combos removed because it was a very easy way to add 3 buttons to tanks. SE always prunes things and sometimes they hit somewhat important or at least fun stuff like Selene's entire original kit, Machinist's aoe turret Bishop, Dark Knight's Blood Price which gave them mana upon taking damage, or Summoner having two pet buffs. Healers in ShB just got probably some of the worst pruning and it shows, Scholar being probably the most noticeable and destructive to its original identity.
Also AST's minigame in HW-SB was worthless imo, you literally fished for balance after you got spread RR that was pretty much the best answer because everything else was super situational or even cucked your dps because arrow had a tendency to fuck up rotations especially on Monk, Samurai, and Ninja due to their faster gcd. I don't think it ever added anything and only served to confuse and frustrate players. This isn't even going to the infamous "fish for two balances for 5 minutes" shit in the pre-pull. Today Ast gets a hell opener to mess with today and gives you enough room to care if you are on voice and can align your cards with dps windows or something. Ast is imo pretty close to being what I think the ideal healer, if they can't get a real dps rotation, should be and it has a decent amount of room to optimize if you want to time your cards with someone's burst window as almost all dps have slightly different burst timings. Ast is like the closest to feeling complete, Scholar is just missing things, and White Mage is just badly designed as a whole imo.