What Healer kit (not encounter) change would make GCD heals NOT bad gameplay?

[Renathras]

Well, while https://forum.square-enix.com/ffxiv/...lers.../page13 is the thread that discussion was happening in, it moved on.

Man the topic shifted.

So new thread then:

Wanted to ask a question after reading Nizzi's post here in the SGE thread: https://forum.square-enix.com/ffxiv/...=1#post6309157

So, I'm confused about something:

SGE: Toxicon is bad because you shouldn't use GCD shields because they're GCDs, but if you do, Toxicon is still bad because it's a DPS loss. So using Toxicon or using GCD shields are bad and that needs to be changed.

WHM: Using non-Lily GCD heals are bad because they're a DPS loss. So actually using GCDs on WHM that aren't Glare or Rapture is bad...but that needs to not change, as making those other things damage neutral would be bad.

I'm trying to figure out what change we can make to these Jobs to make it where using GCD heals is NOT bad gameplay.

So, the question:

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How would you make using GCD heals NOT bad gameplay, if not them being damage neutral?

How would you change WHM's mechanics such that using Medica instead of Rapture or Cure 2 instead of Tetra is actually good gameplay?

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Note that the question is not "How do we make these things proc from oGCDs". We have all these GCD heal buttons. How can we make them useful and valuable and not poor gameplay to use, aside from making them damage neutral?[EDIT: Note that this isn't some intent to push the damage neutral thing. I'm genuinely wondering what other options are out there.]