Okay so I think we all agree introducing Palpatine at the start of TRoS was a mistake. But what are the alternatives?
Introduce Palpatine at the end of TLJ.
Introduce Palpatine at the end of TRoS.
No Palpatine at all (good luck).
Most of these options have been explored, but I haven’t heard anyone consider moving his reveal to the end of the film. Cut all of Kylo’s scenes at the start, and change the Resistance dialog to refer to Palpatine as dead when they talk of his fleet. Then Rey shows up on Exegol and guess who she finds?
To me, the seeds of Palpatine need to be rooted very early in the trilogy. I know it is a very “fanedit” thing, but I’ve always thought the best way would be to have Snoke talk in an ancient Sith dialect with subtitles. Establish it from his very first appearance that he is more of a Sith prophet than Kylo’s actual master. He should motivate Kylo’s journey by alluding to a “sacred army being forged” that he is destined to lead, and that he will be the essential part of the “dark lord’s” plan. Plenty of Palp teasing. Then, end TLJ on the cliffhanger of the first Palpatine scene.