Yeah, so his mouth his fairly invisible during the whole: “Send a ship to a world they know. Let it burn. The Final Order begins.” And this is ideally the dialog we would want to replace. Since it comes right before “She will come, her friends will follow”, we could start drafting what he could say about Rey. Perhaps something like, “My granddaughter will be my vessel in place of Kylo Ren. Do not disturb her approach.”
The trouble is that Palpatine’s voice is ingrained in all 5 channels in this scene. So… yeah. We’d need an audio wizard to patch this up.
One other fun thing I’d like to do is redub “Come to me on Exegol, General Pryde” with “Come to me on Exegol, Supreme Leader”. To make it clear that since Kylo Ren is gone he has inherited the 2nd in command below the Emperor.