For the most part yes, WOW AOE healing tools are much more gated than here in FFXIV. For example, a quick thought experiment of how we'd make WHM play 'like WOW':
- Medica 1 now has a 15s CD and is now 200p
- Medica 2 now has a 60s CD and is now 200p (with no HOT)
- Asylum now deals all of it's healing instantly, has a 60s CD and is reduced by 6sec each time you cast Medica. Also it's now 400p
- Liturgy of the Bell now has a 2min CD, and heals singletarget for 200p whenever anyone in the party drops below <HP threshold %>. Lasts for a total of 15 heals
- Cure 3 has no CD, but deals 60p healing per stack of <buff name>. You get one stack of <buff name> per spell cast (including damage) and it caps at 10 stacks (for 600p)
- Assize's damage potency is halved alongside the healing, to 200p each
Rapture is already gated by Lilies so that's probably okay to stay as it is CDwise (but it's potency gets halved too). But yeh, the point is, to make FFXIV healing 'more like WOW's healing' re: triage, fast reaction to random damage events, etc, it only works in WOW because access to AOE healing there is much heavier gated, be that by CDs, resources, or just number of abilities that are AOE heals in the first place. There's a much bigger focus on either singletarget-ing, or finding creative ways to make the single target effect multiple people. Examples include Beacon of Virtue, a modified Beacon of Light via talent, which duplicates any single target healing to up to 4 party members, at reduced effectiveness. Essentially in our terms, Synastry, if it made your ST moves hit the whole party for 10% instead of one person at 40%, for example. Or, a recent addition, Echo spreading on Evoker, duplicating any healing on an ally to the Echo'd target. And you can set up with up to 3 Echo's at once, so you could hit 3 DPS with Echo, then 'not-Cure2' the Tank, and it'd count as hitting all four targets with Cure2, including proccing any associated talents for using not-Cure2 on them.
Even the above thought experiment for the 'WOW'd WHM' is more 'complex' than what we have now, because it has a CD being reduced by another CD's use.
But, as mentioned by others, think about what that above kit would mean in practice. You can't clear TEA J-Waves with that kit. You can't do most Savage HPS checks like Styx with it. Heck, I'm not sure you could do Harrowing Hell in Normal Mode. The amount of 'change' required to get the way heal, as a paradigm, to be 'more like WOW's healing with triage and stuff', would quite literally cause incompatibility with old content. With DPS being ballooned in old Ultimates (getting Bahamut below 60% at the cast for Tenstrike in UCOB, instead of it being a close DPS check for example), at least the 'problem' there is 'well, you are able to meet the damage check much easier', but you still gotta do the mechanics, you still gotta do Heavensfall or Tenstrike without blowing the raid up. With 'the AOE healing capabilities are less now, because of the redesign', we just won't be able to keep up with the damage the old content pumps out, because it was designed around the assumption that the healers would either have a spammable Medica (or equivalent), or a spammable Succor (or equivalent)