I mean it would of been better if Kaguya took over Madara body, but somehow Madara lower body regenerated to whole Madara and Madara survived. If Madara survived then he would appear in the movies and the new manga. Madara could of paired up with someone.
I am sure if Madara knew he along with all the Uchiha were manipulated by Black Zetsu then he would of turned good.
Madara didn't have to die to be honest, they could of sealed the Gedo Mazou into Madara and he survive fine.
Alot of villains became good, madara is my second fave, I wanted him to die like a boss that he is, it would ruin his xter if he became good, and after all he did in the war, to comeback and live in peace? Haha that aint possible, I won't forgive kishi if that happened, coz if he becomes good that means rinne tensei, and that means naruto manga is ****ed up, when obito was gonna use rinne tensei I thought he was gonna revive the dead, if he did I sworn to stop watching naruto coz it would be complete bs for a war to happen with no casualties