I say just turn Exogol into Korriban. Instead of a rip-off, why not use the real thing?
Too many characters have visited it in the past. If you make this change, the entire plot and chain of mcguffins to be able to travel there doesn’t work. You’d have to make a lot of changes as to why they can’t just go to Korriban/Moraband.
Yeah I guess you’re right. Maybe the plot could be changed so that the resistance only knows that Palpatine is out there without any knowledge/mention of Exogol. Rey would see visions of the Sith wayfinder (induced by Palps, “find me”) and so she checks the Jedi books where she finds that the Wayfinders where an ancient navigational tool used by The Sith of old.
So instead of looking for a hidden planet they are searching for Palpatine himself, effectively finding him on the long forgotten world of Korriban.