If anything, if Hayden is in the film and gives us a good performance, that would redeem him in the Star Wars universe. People will see him as that excellent role in The Last Jedi and not annoying Anakin from the prequels.
It legitimizes the Special Editions and every other terrible ass change Lucas did.
That’s like, your opinion man.
I’m fine with them sticking to the SE as the main canon versions of the OT as long as they give us the OOT