Biggest problem with both changes (which I don’t think everyone consensus likes OR dislikes - but trying to find a consensus in Star Wars fandom is like trying to find a rose growing at the bottom of a sewage treatment plant)

McDiarmid replacing Revill: The makeup on McDiarmid isn’t very goooooood, and the dialog changes are just extraneous additions. Styrofoam peanuts.

Christensen replacing Shaw: It’s literally a headswap from a costume test. That’s bush league. Hayden isn’t even ACTING in the scene.

I am wondering if, much in the same way McDiarmid has replaced dialog in Rebels while working on TROS, they’re going to re-do Christensen’s appearance at the end of Jedi so that he’s actually ACTING in the scene? But I guess that’s really unlikely now that we’ve seen the 4K masters and that shot hasn’t been re-done at all.