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

[TouchandFeel]

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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.