Ok, let's say that when SE gets rid of Surplus (and I hope it will), there may be Mobile parties. Or just when doing levequest. As you said, you need a constant HP regeneration, and I agree.

But even with that, the rate is too high. Plus the mp regeneration makes some abilities useless.
I had not the chance to start with a mage job, but I usually play with Duo with a mage friend and well... Prior the mp regeneration, she used Tranquility when she had it UP, and she had to "administrate" a little the MP. but now? With the mp regeneration how it is right now, mages can do Nukes orgies.

When SE repairs the broken spells, no one will stop mages.

Mages will bring Chaos to eorzea. <-- Just Kdding, but mp regeneration is waaaay to high. I think at least the /rst command my be used for MP.