What if we designed other Tank's abilities like they were made for WAR?

[Shurrikhan]

Frankly, I think there should simply just be less healing power in non-healer kits, and probably in the healer kits as well.

Oh, agreed. Go back to Shadowbringers levels, rework Nascent Flash to be less insane, and give PLD some manner of free healing that is weaker but more time-able than Req-heals.

Additionally, kill Tank Mastery, reduce the Fending gear advantage to eHP slightly, tune down anti-tank damage slightly accordingly, tune down all healing to nearer to damage-dealing potency per action... and ideally remove Rangers' +20% damage traits in favor of just 20% more potency on their skills, and the +30% damage and healing traits from Healers in favor of a bigger damage increase on their level 40ish attack upgrades (no buff to healing), so that one job's 400 potency isn't randomly another job's 520 potency. Then --very pipedream-- actually give back healers some offensive complexity and give back tanks some control between prioritizing sustain and pure offense.