This ignores the fact that, thanks to EW and the stat squish, things that are 'very hard and need these specific tools' are now 'don't need those tools anymore' by sheer potency creep. Mitigation plans for UCOB or UWU on release would look nothing like what we have now, especially considering Feint and Addle now work on their opposite damage type at 5%. When they announced EW changes for WHM my first thought was 'hang on, Thin Air only affects 1 spell now? How on earth would a WHM get through J-Waves in TEA without going OOM?' because I found that part very rough on my MP. Whether it's because I was bad, or because of EW potencies, people have cleared since, with that updated Thin Air. There are plenty of skills that are 'surplus to requirements' already in current content, let alone old content. Like, 95% of the time we don't actually need Exaltation as AST, it's just a thing we press cos it's there, but if it was removed tomorrow, we'd likely not notice.
Don't remember what thread it was in (they all blend together at this point), but I also found ways to knock the button total down, to keep them below 32 (4 X-Hotbars, for the controller players). This wasn't even with a big rework like Taurus posed, either, this was 'these two being seperate buttons is bloody stupid, let me fix that'. Taurus is right, the way they got the button count down is not the 'only way', but if they can find a way to do it, and I can find a different way to do it, SE doesn't really have an excuse when they are literally paying people to do that job, and they can't find either of the ways we came up with, or even a third way that also works.
Also, where do they get off saying button bloat is an issue, then having SAM in the state it's in? Make Shoha2 an upgrade to Shoha1 (aoe centered on target, not player), and change Senei/Guren from 'costs 25' to 'generates 25', make them grant 'Ogi ready', and remove Ikishoten entirely (of the 50 generated by Iki, 25 goes straight on Senei anyway). Wow, two buttons freed up just like that. Or what about RPR, why the heck do we need Shadow AND Whorl of Death? Why not just have damage falloff on Whorl, so it's 300p to the first target and 65% less for all others?
For example, with my current hotbar setups I could change the healers as follows:
-WHM, upgrade Cure to Cure2 at 30 (MP cost changed to 500 for both), Medica upgrades to Medica2 at 50 (just add the regen effect, base potency remains same), leaves 5/32 free
-SCH, upgrade Physick to Adlo at 30 (MP cost changed to idk maybe 700 for both), upgrade Lustrate to Excog at 66 (yes this means you can Excog 3 people, no it's not imbalanced because it's limited by AF stacks), 3/32 free, could get another by making EnergyDrain the AF generator, and removing 'Aetherflow' as a button. Also why the heck did Ruin 2 never get an updated VFX?
-AST, upgrade Benefic to Benefic2 at 30 (MP cost changed to 500), Helios upgrades to Aspected Helios at 40 or whatever it is now (same as Medica, just tack regen effect on), make Horoscope's heal a trait for Celestial Opposition, by making it possible to detonate the HOT from CO early to instantly grant all remaining healing from it, plus the 200 from Horoscope. Letting the HOT naturally tick out, however, grants the empowered Horoscope heal of 400 (skill expression? perish the thought!) 4/32 free, can make it 5 by deleting Astrodyne cos I hate it
-SGE, it's already at 3/32 free, and is fairly compact via Eukrasia system saving us space. Could still save space here and there, eg. Eukrasia on Dyskrasia becomes Toxicon, or just deleting Soteria and buffing the base heal of Kardia a bit. That'd make it 5/32
tl;dr surprisingly not difficult to condense healer toolkits, mostly as they have several buttons that translate to 'heals X potency in an AOE' in some way.
You can just tell when they don't know what to do for a healer, so they give it a copy of the skill the other healer has. Celestial Intersection being the AST answer to Divine Benison is one thing, but it's painfully obvious with a lot of Sage's kit, because not only does it function similarly, if not 100% identically to it's SCH counterpart, they're even learned at the exact same level. Ixo/Indom at 52, Pepsis/EmergencyTactics at 58, Physis/WhisperingDawn at 20, Holos/FeyBlessing at 76. It's so egregious, I used it as part of the logic of 'where should I put this Sage skill for my muscle memory' when the expansion first dropped. Other stuff I had to adapt based on its function but it translates fairly well, eg Taurochole and Excog work differently, but they're both 45s CDs that use 1 stack, same button. Soteria/Fey union both empower the 'passive healing' effect of Kardia/Embrace, same button.