Would have been sick to have Palpatine hiding in the sith shrine deep below the temple instead of Exogol, right under the noses of the New Republic and The First Order. Imagine the surprise of the destroyers emerging from deep below the surface of the industrial regions of the capital. A true power play.
Judging from this concept art this may have been the case in an early draft.
https://mobile.twitter.com/CultureCrave/status/1218324295765512192/photo/1
Hm. I’d read that concept art as an initial version of the Mustafar sequence, with him finding the wayfinder within the Emperor’s vaults instead of what is meant to be the area nearby Vader’s castle.
That being said, that is a dope visual.