If anybody is even remotely skilled at deepfaking I’d imagine that dark Rey’s eyes could be taken care of rather easily. Yes, you’d be deepfaking Daisy Ridley’s face onto Daisy Ridley’s face but based on what I understand the eyes would be normal again once finished. Might be something I’ll look into myself eventually if it’s all we are waiting on.

It’s also worth looking into for the brief young Leia appearance in the flashback. Luke looks fine but Leia is definitely in the uncanny valley like her appearance in Rogue One. A simple deepfake should fix that.