They're far from overpowered. WAR dished out an immense amount of damage throughout much of 2.0 and 3.0 whilst PLD was forced to hit like a wet noodle by comparison. It's fair for PLD to finally be in a strong spot after being stuck in a horrible spot for the better part of two expansions.
Good insight : Make all non paladins tank pay for an era they weren't even probably playing, so all the paladins including the many that never played this era, get satisfied.

Job Pools aren't a "big common brain of different people sharing the same memories and guild", they are different people, with different history throught the game. FFxiv achieved higher and higher player base since the relaunch, with an actual peak at SB release, and none of thoses players give a shit or have anything to pay for ARR or HW bad balance.