I know Levi doesn't dwell on what-ifs, has likely forgiven Erwin a long time ago and would probably even brush it off, because Erwin couldn't have known the future.
But I'd really like to have Erwin approach Levi one day and tell him he's genuinely sorry for how he treated him when they first met in the Underground. Maybe even tell Levi how he would've treated him differently back in the No Regrets days, knowing what he knows now.
Our guy didn't deserve to be handcuffed, forced to his knees and have his face shoved into a puddle of filthy water. And it's especially painful to look back on that scene knowing that Levi eventually devoted his life and strength to humanity and this man, was fiercely loyal to him, became Humanity's Strongest Soldier and arguably the closest person to Erwin (and loves cleanliness).
As for the scene where Erwin finds Levi after he lost Isabel and Furlan…
Damn 💔, Levi definitely was not in a mood for accepting comforting hugs or a long heart-to-heart right then, but he'd lost the two people who were his family, everything he'd been working toward had fallen apart, and he was left all alone, so I really hope Erwin didn't stop at the speech and tried to support young Levi emotionally in some ways off-screen (idk, at least bringing him some tea, sitting with him without forcing him to talk, or simply making sure he didn't have to face everything alone).
If he didn't, I'd wish Erwin had apologized for that, too.
Wouldn't change the past, but I feel like hearing Erwin acknowledge how much Levi'd been through—and that he hadn't deserved to be treated so harshly—could be sort of healing for Levi nonetheless. 🥺❤️🩹