I’m also not convinced much of this has to do with Disney. For better or worse, this is the vision a Lucasfilm without George has for Star Wars.
I think the saga should end with 9 films. I think the other films should focus on other times and other people. I think for trilogies it needs to be something epic, but for a one off film it could be about anyone. I think for the trilogies they should go back to the glory days of the Republic and Jedi. We have Palpatine saying the Republic is 1000 years old and Obi-wan saying the Jedi have been the guardians for a thousand generations, which by some estimates is 25000 years. So that is a huge time frame. It would be fun to have a Trilogy on the origins of the Prequel republic and it would be awesome to do some movies from way before that. When the Sith were the real enemy and not just maneuvering behind the scenes. There are so many corners of the Star Wars universe and timeline to explore. The possibilities are endless. We need to be done with the Skywalker story.
I think if they move away from the episodic saga, they should take that as an opportunity to move away from trilogies. Why not a pentalogy? Or a show?