Vader with eyebrows was a bit of a head scratch. I can only assume it’s an homage to OUROTJ. Still, this is a series that is firmly entrenched in the PT continuity (this episode especially) and Anakin clearly lost his eyebrows. And, honestly, I think getting rid of the eyebrows in ROTJ is a good change - it makes sense considering.
Also not sure if I buy the logic of hearing Anakin’s voice when the mask is damaged. And why the fuck is Vader always getting his mask broken and face exposed in EU stuff?