I’ve been tinkering with the ending to address a few different issues. As Hal pointed out, it’s very disconcerting (to some of us) that Palpatine tells Kylo to “Kill the girl,” but then hinges his entire plan on getting “his granddaughter” to Exegol alive. In my edit, Palpy doesn’t claim to have wanted this all along; rather, he uses the opportunity to try and tempt Rey into killing him, thereby causing her to fall to the Dark Side. (Like how he told Luke to “Take your Jedi weapon. Strike me down.”) This has, in my opinion, a number of additional benefits, aside from cleaning up the primary storytelling inconsistencies:

It helps to tie elements from across the Sequels together - namely some instances in the previous films where it felt like Rey was being tempted by the Dark Side. In this film, she literally tells Darth Sidious himself “You want me to hate but I won’t.” Cool. Where exactly is the conflict? The character buildup? And what does J.J.'s idea of “Rey being literally possessed by Palpatine’s soul” have to do with the rest of the saga?
It means that Palpatine isn’t just “an evil thing to beat.” He’s instead used as a reflection of Rey’s own inner darkness. This helps to make the stakes more personal, and therefore more uncertain for first time viewers - it feels like she may honestly turn. Additionally, this means the scene is entirely about Rey now, and not about whatever possession plot Palpy came up with while he was snoozing for the past 30 years.
Palpy no longer babbles over the entire scene. It’s now more focused on Rey. (You know, the “protagonist.”)
I removed the sections where Palpy tells her, “Absorb my spirit to save your friends.” I think this should be an internal conflict, a battle for Rey’s very soul; not some arbitrary blackmail thingy coming in at the eleventh hour. Plus, not only is it a boring retread of something that just happened in the previous movie, but it’s also very thematically muddled. (For example, Palpy convinces Rey that she’s responsible for his own troops killing her friends? I get that he’s trying to manipulate her, but the whole thing just doesn’t land for me, personally. To me, the movie itself frames it like, “Huh, Palpatine actually has a point there.” What is any of this supposed to say thematically? It’s like the entire thing is set up to make Rey not have a choice; which is stupid, because A) That gets rid of her agency as a character, and B) That means a complete lack of dramatic tension.)
Rey’s darkest thoughts begin to take over; and it’s only when she sees that Ben has reformed and has come to her aid that she is able to calm her emotions. Thus, he helps her emotionally complete her journey as a Jedi. He’s not just there for his physical presence.

Smaller tweaks:

Changed Rey’s line from “I haven’t come to rule the Sith; I’ve come to end them.” to “I’ve come to end you.”
Changed Palpy’s line from “The time has come” to “So, the time has come.”
Changed Rey’s line from “But I won’t [hate you, Grandpa!].” to “No…I won’t [murder you in cold blood.]”
Removed Rey nodding to the Emperor, like “Okay, I’ll do your bidding. Just help me save Padmé.” Lets keep the suspense going instead. What is she going to decide? Will she kill him? Will she fall??
Moved Palpy’s newest “Do it” meme to earlier in the sequence.
Added Palpatine ordering his guards to kill Rey when he realizes that she won’t fall to the Dark Side after all.

In short, stronger character drama, more consistent storytelling, and better payoff from previous films.

https://drive.google.com/file/d/1E-g834NDnJeoItEVfSyjDvvw9INy4SmY/view?usp=sharing

Some of the edits may have to be cleaned up more, especially in stabilizing the musical score (bear in mind that some of these harsh cuts are just because I removed the spaceship/spacehorse battle for the demo here), but what do you think as a rough concept?

Also, while I was cutting the footage, I removed the Rey Palpatine angle from the scene. This was mainly as a proof-of-concept for the Rey Nobody version, but it would be pretty easy to slot back in some lines such as “The only family you have here is me.” “It is in your blood. Our blood.”