It makes zero sense for the PLD class to have three different skills for AoE

[Lyth]

There are a few reasons why I brought up the removal of TP from the game. A lot of what happens with our AoE system is going to depend on how this gets implemented.

Right now, every AoE in the game has a resource cost attached. If you bottom out, then you're stuck with single target moves until your resources tick back up. When TP is removed, one of two things could happen: we could see some of these AoE actions become free, or we could see an alternative resource attached in place of TP (i.e. MP).

If TP costs are simply removed, then some odd things happen. PLD's primary dps AoE becomes free (Total Eclipse), and paradoxically cheaper than their zero damage enmity AoE (Flash). WAR's overpower becomes free, giving them better sustain (and bear in mind, Overpower isn't all that far behind Total Eclipse in potency). I think that in order to happen, you'd probably see everyone have a baseline AoE enmity move that was free, with a dps AoE that cost resources to use (i.e. MP for PLD, gauge for WAR, blood for DRK).

If TP costs are replaced with MP costs, then you run into a situation where Flash and Total Eclipse are both competing for the same resource, while the other tanks can spread their resource costs across two different bars. I think this still points to the fact that Flash isn't fun to use, and PLD would benefit from having Total Eclipse moved down to Level 6 as a primary enmity AoE, while gaining a magic-based dps AoE fuelled by MP.

With regards to why WAR can't generate gauge by using AoE moves (be they GCD or oGCD), it's because Decimate provides so much burst, and Steel Cyclone provides so much self-sustain. If you wanted to implement your suggestion fairly, you'd have to give a fairly substantial nerf to both of these abilities, not Overpower. Otherwise, you're running into a situation where you're just buffing WAR's sustained dps without compromising burst at all.

[...]the game should be called Final Warrior: A Warrior Reborn, HeavensWarrior, StormWarrior, WarriorBringers because they're the best class in the entire game.

I was going to suggest "World of WARcraft".

[TouchandFeel]

snip

I highly suspect that they will just consolidate TP and MP into one single resource. Functionally it will be mostly the same to what we currently have, just no separate TP and MP, just whatever they call the new resource.

If they go this route they will likely remove any resource/tp cost from combo actions while retaining a resource cost for other abilities like Overpower.

As for Total Eclipse and Flash, that's a tough one to predict how it will be handled since the dueling resources and switching off between the two actions was sort of the defining aspect of PLD AoE, but I wouldn't be surprised if they went the much requested route and removed one of them and just consolidated it all into one ability that did enmity and damage in one ability, maybe upgrading Flash with a trait.
If they do keep both abilities they will probably make them similar to Unleash/Abyssal Drain where Flash costs a lot less and Total Eclipse costs more.

In the end we won't know for sure until they reveal the combat changes coming with ShB.