How can tanking and healing be made more broadly useful in more "role-specific" ways?

[Reynhart]

This is entirely different way of calculating a "victor" that is entirely based on players abilities. Sorry, but if you think this is a gimmick, then you are effectively calling winning a battle through DPS a gimmick. And that it clearly is not.

When everybody has HP and the main reason we even face foes is to kill them, winning a battle through killing things is not a gimmick. You'd have to create a whole new explnation on why we don't kill them anymore. The kind of explantion that works in PvP where the goal is generally not to kill.

How is that different from now?!

It's not, but this is exactly hte kind things we want to fix.

Irrelevant, because that's exactly what this prevents. Healers will not WANT to wait until you are low on HP to heal you.

Healers also do not want to spam heal all the time because they will simply over heal and burn through their MP much faster. And each time someone dies they will also suffer an additionnal damage penalty until the healers uses more GCD to bring them back to full.

This sounds a lot like the current meta now, you even used the phrase "a healing focused healer is kind of a liability" which is very much the overarching concept which defines the meta right now.

I was describing the current type of enrage

Right now on WHM if I get a group with slow DPS I can turn on the afterburners (PoM, Cleric) and in an AoE situation I can outdps most other classes anyways.

But your personal DPS throughout the fight has a lesser chance of saving the run than if your healing capacities would allow the whole party to deal damage for one more minute. Keep in mind that I don't want to remove all DPS capacites from healers, just to give them a way to contribute in winning even by focusing on healing.