What healers could stand to lose.

[Volkaj]

Never mind, you are missing the point, and I don't know how to make it easier to understand, other than saying that one set of heals are the basic variety, that just do pure heals, and the other the gimmick heals, which provide an additional effect per healer. One set cannot be compared with heals from the other set.

Why not? You keep saying I'm missing your point, but you seem to be splitting up healer kits and comparing arbitrarily, without concern for how it actually plays. Sure, if you limit your view to just pure GCD heals without any other effects SCH would be missing something, but in the same vein if you limit your view to shielding GCDs then WHM doesn't have anything. You also keep ignoring that the basis for my suggestion is on how and when the skills are actually used in content.

The other tools are irrelevant to this conversation though, since they are oGCD/Guage heals and aren't directly comparable to the basic heals or the gimmick heals; regardless of their potencies or any gimmicks attached.

That is possible, but then at that point why wouldn't you just use a more powerful direct heal instead?

If you really mean to say "a more powerful direct GCD heal without a gimmick", then because I would consider the entire kit available to me at that moment, not just an arbitrary subset.

They don't have one because it was "removed/upgraded" so why do the other healers still get to keep a pure heal and a seperate gimmick heal.

Because they have different use cases?

EDIT: there is also the fact that the Shield has a time limit attached. Regardless of whether healing is needed or not, once the shield dissipates, the players HP pool reverts to their actual white HP bar, so you would still need to heal them up with a pure oGCD or GCD heal. If a pure heal was used from the start, that added heal wouldn't be needed.

You could just wait for a more opportune moment to heal them with it, or use Emergency Tactics.

Either way, you shouldn't spam Adlo because of shield delay. You're overwriting the shield before it's even being consumed
In case you don't know - Shield Delay is a 1 second (ish) time frame where the buff is on the the target, but doesn't actually take damage for them. (I believe it affects Hallowed Ground and Superbolide too, as those are treated as infinite HP shields).

Does this still apply when the shield buff visibly drops off your target before your second Adlo lands? That was the scenario I was thinking about in terms of Adlo spam. If the shield doesn't drop, then it means your target is taking less than ~300 potency worth of damage per GCD, and you can probably carefully interweave some DPS inbetween casts.