Honestly I preferred it when none of the healers had a full healing kit. SCH has powerful shields but weak heals. WHM had powerful heals but no mitigation. Either could complete 4 man content but you needed one of each for serious 8 man content. The introduction of AST made this more complicated, since healing was previously designed to require two roles. So AST has the sects. At the same time SCH got a lot more direct healing power (hello Indom) and so became more capable of being filling either/both roles. WHM was still stuck in its rut. Adding a 4th healer could help them get back into a better balance with WHM and AST (without nocturnal) as the big heal-y/Regen healers and SCH (with a bunch of their big heals reworked into mitigation) and (new healer) as the mitigators. You could further divide by having WHM and SCH be the personal dps healers and AST and (new healer) be the buff healers. You could then differentiate again by having WHM and (new class) as the simpler offensive skill healers and SCH (with old dps abilities restored and chain strategem replaced with a personal buff) and AST (with old cards restored) as the more complex offensive options healers. The new healer could even use the new AST cards with a reskin as their buff mechanic.

WHM and (new healer) would probably be preferred by the top parsers, because they’d have to have the same damage potential, and the same damage potential when easier to deliver is generally more damage, but I’m okay with that. I’d be too busy having fun on SCH and AST with whatever group was a bit more relaxed to care.

But yes, I’ll agree that the moves I want most are the moves I lost. I would much rather play Heavensward SCH than Shadowbringers SCH. (Then again, I’d also rather not play ffxiv than play ShB SCH so there’s that).