Just gonna point out that the energy drain you want back is NOT the energy drain offered in ShadowbringersI don't quite feel like quoting and dealing with the annoying character limit so I'll just respond in sequence.
1. White mage has always been the best at dungeons. It just has never been this far ahead. It's not really that white mage got buffed in this area, is that's the other two healers got substantially worse. Scholar lost bane and shadowflare. Ast gravity got a huge nerf, losing 70 potency while also losing their stun on celestial opposition. Meanwhile white mage did get a pretty sizeable holy nerf, but they got to keep assize which is as strong as ever and they got afflatus misery. On top of that, white mages pretty much have infinite mp in dungeons, though this point is less significant because of the mp reductions on gravity and art of war.
2. I never said white mage was fine these past 4 years. What I will say though, is that white mage is far more overpowered right now than sch and ast ever were.
3. Crit adlo does not even come close to shielding a tank for half their hp. You also can't spread the entire shield. It's not as good as you're making it out to be. It's strong yeah, but it's not ridiculous. It would be incredibly overpowered if you could deploy the entire shield.
4. Raid buffs and fflogs is a valid point. I've said many times in other threads that SE's approach to balancing is doomed to fail every time. White mages needs their own utility.
5. 100% agree that sch should not get buffs. Sch needs some QoL changes, that's it. I want energy drain back. If they nerfed broil to compensate for that and sch did overall less damage, I'd be happy with that because the class would feel better to play. Ast does need buffs; there is no disputing that.