Is there a way to actually use Plenary Indulgence?

[Maeka]

Like others said, boosting PI doesn't make any sense, if you don't even use Cure III on a regular basis. You want more free AoE heals, but tell me, for what?

And with what justification? WHM already has best AoE heals and best MP Management. So ok, you want better PI and impactful?
Ok, if they also do a 50-150 potency nerf to every AoE heal GCD and also Assize. There you go, PI is now much more important.

We want to keep things balanced, right? So if you say "I want better PI" you should also need to say "I'd give up xyz as trade-off.".

I would have been fine if they had done anything else to PI than AoE healing in the first place, because as you said we have a lot of AoE healing already... but yet, you know, Lv70 skill? It'd been nice if our Lv70 skill was actually useful in more than the "occasional S&G skill". It's a letdown, to finally ding 70, see that you learned a new ability that is useful like... 1% of the time, and in only a handful of situations. THIS is supposed to be the "Ultimate" skill we learn? lol.

Do other classes have this problem with their Lv70s as well?