The thing about the vision in TFA is that it isn’t rapid fire imagery like TROS, it’s a fairly linear journey with Rey present throughout. That’s why audio additions are really the only change that worked there.
EDIT: It may have been mentioned before, but Exegol/Palp’s house could be added by retconning that rainy planet where Kylo is killing a bunch of randos with his Knights. It looks similar enough, you could just add Palp’s place in the distance instead of that temple place.
Interesting idea, but isn’t that vision scene based on events that occurred? Kylo didn’t know anything about Exegol and needed the McGuffin to get there in ROTS … and if he was there and we see Granpa Pal’s House in the background … wouldn’t he have explored it and unraveled that mystery a long time ago?
Though I like the idea of trying to tie things together to make it more cohesive, so brainstorming idea is always a good thing.