A true redemption arc would leave Madelyne in a heroic light...or at least a neutral light. Clones rarely get that kind of treatment. Whenever she appears it will be either as the villain, or the feint of a greater villain. The only way to avoid that is if you remove Maddy from the X-Men universe altogether. I know I'm being repetitive here, but I'd almost kill to see Madelyne on a team with a few other characters who have been written off as damaged, beyond redemption, or simply not worth the bother. A heroic team outside of the X-universe. I can almost see Scott's face now, waking up to read the online paper on his tablet and seeing Maddy's smiling face under the headline: "The Earth's Mightiest New Faces! Avengers outreach closes the global divide."