Maybe. I feel like it’s beyond the scope of Vader as a character though. His redemption isn’t just the end of his character because he should die for what he did, but because he’s just no longer an interesting character once that’s done.

It might be interesting to see Anakin have to atone or pay for what he did somehow in the afterlife, but I think he’s better off dead in RotJ.

Maybe G&G’s on to something, and the point of Vader’s redemption isn’t so much that he’s becoming a good guy, but that the small glimmer of good that’s in him (and by extension, in everybody) is showing through. By showing Vader actually put in the work to earn forgiveness would make an arc of him becoming good more satisfying, but would add a ton of unnecessary complexity to the theme Vader’s redemption is in service of.