For those who main/semi-main a DPS (e.g. DNC, RDM) but like Healers...

[Shurrikhan]

Anyway, as to what you said above:

4 Healers Model.

That's the entire point of it as a proposal.

And that might get more agreement, or at least traction/discourse, if you clarified how much gameplay in total each of those differently-modeled healers would have available to it.
:: Well, that and if the name made sense for the goal, since you've suggested that only 1 or 2 should be "Healers" and the others more akin to "Supports", but I'll admit that "Categorically Diversify What Each Healer Offers in Both Capacity and Gameplay" wouldn't have much ring to it, even if it'd finally have clarity.

Thus far, you've framed it as much around each healer avoiding the others' aspects as each having an aspect or two significant and enjoyable gameplay added to the existing mostly-shared model of Healer gameplay, and you've been explicit in defining one by its having little going on (basic healer with Glare-spam)...

Perhaps a refresh on just what all you'd imagine each healer having added to its gameplay as a result of this model? (Since, at the end of the day, we play those jobs and not whatever mental frameworks by which they're taxonomized.)