Waiting for Andor’s next season is a good call. Unless I am grossly mistaken, the final season has a timeline of a few years to lead into Rogue One. I just hope it is not significantly delayed by Disney’s current issues and the Hollywood strike drama.
As for Vader’s voice, can anything be done using AI to replicate Jones’s voice from A New Hope? I can see where Hal is coming from wanting to use the actual voice of JEJ. I wish it were possible to use his younger voice.