I think F&F at least had an idea of where they wanted to take Mando. We start here and we get to there. I'm sure over the course of development, writing, shooting etc., things evolved and changes were made.
IMO the Sequel Trilogy had no such vision. I don't know why, but I envision the initial pitch meetings going something like:
Kennedy: "We're going to make a bunch of Star Wars movies"
Iger: "What kind of Star Wars movies?"
Kennedy: "Don't know. But they're a bunch of Star Wars movies. And they'll make a bunch of money"
Iger: "I like money."
I find it hard to swallow that when they were doing the initial casting - somebody looked at Daisy Ridley and said "Yep. That's Palpatine's grandbaby - she gets the part."