If lightning hitting tehe Emperor deforms him, could that mean that Vader was still looking like Hayden throughout the OT? And his unmasked appearance is a result of getting hit by Palpatine’s lightning? So when Vader decided to thrown him down, he became a Jedi again while still looking young, that’s why Force ghost Hayden makes perfect sense. George, you brilliant writer mastermind.
Except for that scene where you see him putting his helmet on. They could always CG that later tho.