I like it, but it could be confusing, resolving an ambiguous thing about Sith consciousness at the eleventh hour.
Sorry I guess I didn’t clarify. If you’re interested in exploring this idea of multiple voice layers for Palpatine like RL pitched, I would do it for all of his dialogue in the entire movie. Then editors could adjust levels however they like, or even do what RL suggested initially and only have the extra Sith voices come through occasionally.
I would essentially be supplying WAVs of each Sith voice separately so they could be mixed in as desired. Maybe sometimes you only want the whispery ones, maybe sometimes just the croaky ones, or the deep ones.