....Rawr?

The days of our years gone,

That storyline takes Gaius and says "Behold this idiot, watch and be stunned as everything he ever said to anyone turned out to be fucking obviously wrong. Watch as the fascist imperialist philosophy he ingrained into his beloved children makes them run to their deaths, even as he pleads them not to, and they tell him to fuck himself and do it anyway. Marvel as he watches them die by your hand, you, who destroyed Gaius himself at the peak of his life, and he can do nothing to stop it", and that's a redemption arc to people

The only surviving kid only makes it because her brother acts to protect her, she doesn't make it because of any act of Gaius'

The entire story is literally "In case you somehow missed it in ARR and most of Stormblood, everything Gaius believed in was horseshit and there's no such thing as a 'noble general in the evil empire'". All his meritocracy bullshit vanished the second he was gone, no-one but his own children believed it or held onto it, and the empire put someone directly opposed to that belief into his old seat when he vanished. No-one cared, no-one else "believed", the Empire was never about that, it was only propped up in his own singular legion by him being there and the second he was gone the legion dumped it and moved on and only Gaius was too naive and stupid to see it.

I mean for fuck sake, the Empire digs up the chemical gas weapon he explicitly had sealed away and destroyed all record of after he's gone and if it wasn't for a particularly dedicated and enterprising catboy and his comedy crew of hardcore engineers, it would have caused the eighth apocalypse

Even the follow-up in patch 6.4, of the family portrait, isn't some "aw he good now" thing. The family portrait you help organise for him has to have four of its six members be projected onto the scene via a machine's reconstruction of them as normal people because they're dead, they threw their lives away because the ideology Gaius taught them meant they could only think to die fighting and nothing else. That's his loving family portrait: four ghosts stood at his back as his last living child smiles through her pain.

"well the people of Werlyt didn't kill him for conquering them" they let him clean up the mess he made (which meant watching his children be killed) and as "thanks" they're letting him stay there to live out the last third of his life or so attempting to atone by fixing the damage he did.

He's 56 at the time of ARR; the Empire he gave 3-4 decades of his life to is gone, it's a smouldering ruin, all but one of the people he loved is dead, his surviving daughter is scarred by the path he led her down, and what few friends he had are also dead. He learned that his beliefs were all horseshit and pretty much everyone around him except for himself knew it, he must live knowing that those beliefs got his children killed, all that he achieved that he once considered "good" was for nothing, he learned that the cool old emperor he idolised who had no magic but built an empire by pulling up his bootstraps and who told him that magic and gods were bad was actually an ancient incredibly magical sorceror attempting to resurrect his own god.

Cuz if Werlyt was meant to be redemption...they never got there. There isn't time or space for it in the quest chain. And Gaius's redemption wouldn't be a single great moment (and it never is anyway), but a lifetime of work, which he is now set up for.

this all made even better by AOC's contribution to the thread