I look at how things are going with the movies now in the ST and the thing that sticks out for me is that a complete three movie arc wasn't written and agreed before they started. At least it doesn't appear to be. George having an overall input early on (maybe) and first draft of how he saw things which then could have been refined into a full arc, which each director could have taken forward. Regardless of whether I liked Rian Johnson's film making, I can't comprehend JJ Abrams having to now work with the story from this point if he (or Disney/Lucasfilm as a whole) wasn't fully aware of where the story would be and what characters he would have to work with.
Yes, it’s quite baffling that they decided to make a trilogy without any sort of planning. It’s making the ST real messy.