I just want to work out the logistics in my head of moving the Ben/Han scene.

This is the sequence of events in the film, from what I recall:

Rey leaves Ben and takes his TIE
The Falcon returns to the base
Kylo and Han
Palpatine and Pryde/Destruction of Kijimi
Resistance hears broadcast
Poe speaks to Leia/Lando
Poe speaks to Finn
Rey on Ahch-to
Transmission from Red 5

According to the music cues, basically the film originally followed the same trajectory, except Rey on Ahch-to was split into two sequences, and Han and Ben were in between.

For me, the only reason to do this is so that you can have Leia’s body disappear when Ben tosses his saber, rather than when he dies. First of all because it implies Leia sent Ben the memory of Han, and second because, if you think about it, the suggestion in the film is that Leia isn’t at rest until her son is dead. That’s dumb. Moreover, my guess is this was how it was originally conceived, as Leia’s body disappears at night, but the Resistance leaves during the day and comes back during the day too. The other reason in support is that you better organize the turn from “things are bad” to “things are looking up.”

But here’s the problem. The Palpatine/Pryde scene (which needs to come before the next few Resistance scenes) doesn’t work unless Kylo has turned good. You could make the argument that Palpatine’s statement is vague enough, and Kylo’s out of commission enough, that it still works. But it’d be weird. The other issue, is Rey’s scenes on Ahch-to are so brief that you can’t split them up without it feeling weird as well. I suspect all of these moments were reshot to fit the new structure (we know Rey and Luke was reshot, it’s an easy guess that Palpatine and Pryde was reshot, or perhaps just some line changes in ADR).