Do enjoy that FFXIV doesn't write the same villain twice.
In A Realm Reborn we get the cocky, self-righteous Gaius and the mad scheming Lahabrea
In Heavensward, we have the ever raging and prideful Nidhogg, the power hungry and corrupt Thordan and the Heavens' Ward, we get the revenge driven Estinien possessed by the uncomprimising Nidhogg reborn, coupled with the stoic Igeyorhm and a different version of Lahabrea, one more calculating and yet severe.
In Stormblood we have the vengeful Yotsuyu, her bumbling brute, the complicated Fordola, and the disinterested but honed Zenos.
In Shadowbringers we have the driven Ran'jit, the self-absorbed Vauthry, the melancholic and cruel Emet-Selch, and the zealotry of Elidibus.
In Endwalker, we have Zenos returned but seemingly even more ennui than his Stormblood encounter, he seems more inwardly inspective yet seems to miss the point of us, we got the nihilistic Fandaniel, and the cruel to be kind Meteion.
In Dawntrail, we have the boastful Bakool Ja Ja, the self-assured yet waivering Zoraal Ja, the scheming Sareel Ja, the polite Sphene, the diabolical Sphene, and the cold Calyx.
Now with the upcoming patches they've pitched the cold calculating Calyx with the solemn yet accepting Halmarut.
No two villains are truly identical. They could of seen Elidibus and Emet-Selch's popularity and tried the past few expansions to recreate the lightning in a bottle. But they continued to add nuance or a greater element. Even with Zenos returning, he doesn't seem to be the same Zenos as the one in Stormblood. He feel uniquely grown and different from the past. Though he is trying to hit the same beats as he did before, the story is different so things are thus as well. Its a nice change of pace, that he is trying to recreate what he THINKS drew us to fight him in Stormblood and while being introspective and galling of Jullus but completely missing the entire fucking point of our past conflict.
That is to say nothing of how each Ilberd encounter feels different, the Warriors of Darkness, Ysayle, Asahi, Stormblood Era Elidibus, Golbez, all feel interestingly varied. In how they grow and how each of their appearances when set against us are different in their own way. Each no longer a single note but building into a symphony.