A potential rework to the level-sync system.

[ForteNightshade]

People keep mentioning balance yet every new job added isn't balance whatsoever. Dancer is far and wide the strongest DPS in any dungeon by a significant margin. Hell, it has access to 1,000 potency AoE attack 25 levels before Dragoon and Ninja even learn their first. Meanwhile, you get oddities like Samurai being hilariously and comically weak at level 70. On the flipside, Ninja at the level is leaps and bounds ahead because Raiton didn't have 800 potency back in Heavensward or Stormblood nor did Kassatsu have a 30% damage buff . If we look at the other roles, Gunbreaker dominates the other tanks. So much in fact, Warrior can barely catch up to it with a potion. Dark Knight, on the other hand, doesn't even get its AoE mitigation or combo finisher until Shadowbringers. There is a 66 level gap between Unleash and Stalwart Soul. On the healer side of things, White Mage has literally nothing to compete with Astro because for some reason, Rapture doesn't unlock until 76. And with no access to Misery early, it simply can't touch Astro's cards. Nevermind the sheer healing and shielding capabilities.

All in all, synced jobs aren't balanced in the slightest.

[Vyrerus]

Meanwhile, you get oddities like Samurai being hilariously and comically weak at level 70.

You're going to have to explain this? Do you mean relative to Dancer? At 70 Samurai has an 850 potency line AOE that's non-diminishing every other pull, a 360 potency GCD every 5 GCDs also non-diminishing, and a 150 potency resource spending aoe with an absurdly high target cap. 360 potency can be buffed to 540 for more efficient resource spending.

Meanwhile a Dancer at 70 has Technical Finish, 1500, diminished to 375 on every target after, Standard Finish, 1000 reduced to 250 for every target after, 150 > 200 pot combo with 350 and 300 pot proc aoes that reduce to 175/150 to every target beyond first. Oh and the 100 pot Fan Dance II and Fan Dance III oGCD combo, also based on procs.

Technical Finish compared to Hissatsu: Guren against 8 target pull:

TF -> 4125 total potency
HisG - > 6800 total potency -> Samurai Wins.

SF -> 2750 potency
Tenka Goken unbuffed -> 2880(4320 buffed) potency -> Samurai Wins.

Windmill -> 1200 pot
Fuga -> 800 pot -> Samurai loses

Bladeshower -> 1600 pot
Mangetsu -> 1280 pot -> Samurai loses

Fan Dance II -> 800 pot
His Kyuten -> 1200 pot -> Samurai wins

Samurai has to build Jinpu and debatably Shifu first, but Dancer loses GCDs while dancing to build their steps.
Dancer has more potency on general AOEs due to enhanced action damage trait, and higher base AOE potency, but it's executing GCDs more slowly, and has to rely on procs for its highest damage ones to come out, granted the proc rate is pretty high.

I guess maybe if the pull goes on long enough, then Dancer catches up and overcomes them, but then Samurai pulls ahead on bosses. If the pulls are smaller, results change too, as smaller pulls are better for the diminising AOEs. I just don't see what makes it laughably weak.