I don’t care for trying to preserve a plot twist that everybody on the face of the Earth already knows but I do actually really like the idea of Obi-Wan referring to Darth Vader as a Sith lord rather then just “a young Jedi” (a Sith reference in the OT is a great thing in my book, and I also think it just makes more sense from an in-universe perspective), Obi-Wan calling him “Vader” instead of “Darth” (also fits with new canon), and Vader referencing Padme instead of Obi-Wan. I know some people prefer changing ROTS so Obi-Wan tries to redeem Anakin and I can see some of their reasoning but I think the way they did it works better for characterization. Obi-Wan trying to kill him shows the flaws of Jedi indoctrination, fits with his attitude towards him in the OT, and Vader saying “Padme” or “Your mother” instead of “Obi-Wan” shows how Luke is both a more modern, different Jedi as well as having character traits similar to his mother, further reinforces how much family means to Vader, and is just more poignant IMO, calling back to the scene on Mustafar when she said those exact words to him.

I know there are a group of fans who think that later material just shouldn’t contradict older material and the older material shouldn’t be changed to reflect that, but I’m all for retcons as long as they’re good retcons, and all of the retcons mentioned are IMO good.