The AI voices are pretty noticeable to me, though I haven’t been able to test it on anyone else (I’ve seen various cuts of this movie too many times). Poe does sound a bit off, and Rey’s lips didn’t seem to match when she said “ram” instead of “skip,” but maybe not a deal breaker?
I think Kylo’s early AI line might stand out most to me, though. For one, I personally dislike Kylo calling Palpatine a “rotting clone.” I guess I was in the minority on that during the earlier chats on it, but it still feels awkwardly expository and weirdly knowing of Kylo, like he read the script before coming down here. “You’re a ghost” gets the same idea across when combined with the earlier red vats of Palpatines while sounding more theatrical, like “ghost” is also referring to Palpatine being an old has-been and not just “you are a literal specter possessing a body.”
But besides that, while the AI voice does sound like Adam Driver, it doesn’t sound like Kylo in that scene; his follow-up “what could you give me” sounds much deeper and echo-y, almost like he’s wearing the helmet, and having those two lines in basically the same sentence really makes it stand out. If the new line couldn’t be made to match the old one, I wonder if it would have sold better redoing the old line in AI as well.
Sorry how negative this all sounds; a lot of great work has been put into this edit already, but AI voices were always going to be one of the harder sells as far as “would this have worked in the theater,” at least for me personally. Even the professionally done ones with Luke Skywalker in The Mandalorian/Boba Fett really dragged those episodes down for me. But this edit is still a fantastic achievement.