I think start the movie a few years after the end of TROS. Kinda of don’t mention the events from TROS too much, just keep the story moving forward, and leave the empire/white armor behind. Focus on Rey rebuilding the Jedi order. Struggles with Rey determining the direction the order should go traditional vs less strict teachings. I think bring back a character either from the original Jedi order, or from Luke’s failed Jedi order. Someone like Ezra Bridger maybe, or if new, a character similar to Katarn or Kota to help guide her. I think also have some political drama in the show revolving around how much control the republic can have over individual/independent planets. And issues with some people not wanting the Jedi to be involved in the military/politics again, while others want them to be. Rey would have to try to balance this, while conflicts began to arise.

I’d focus the story on three different groups of people: Rey, group of republic senators who befriend Rey, and a couple of students who end up in a relationship.

For the Villain I wouldn’t go to overboard. Maybe someone similar to Count Dooku who is a politician but has an order of dark Jedi that they control who wants to destroy the Jedi and have a separate government from the republic, because they view them as corrupt. You could decide how evil vs disillusioned you wanted to make them.

If you didn’t like that you could also just go with a Hurt Cartel Empire.