As TLJ was before it?
I dont think there is any evidence in the movies as a trilogy that there was any thought in them at all.
I do think Force Awakens was rushed out to capitalise on the Lucasfilm purchase (and start earning their $4bn back), and honestly I think JJ Abrams was a good shout. He is full of ideas, and also adept at approximating theme/visuals of other genres etc.
So he sets up a mystery box movie where he puts a load of pieces on the board ripe for development/opportunity to carry forward.
When TLJ came out it was my opinion that how good Force Awakens actually was would depend on what the sequel did with all the loose ends.
And Rian Johnson clearly gave no fudges about any of that, making a point of bluntly dismissing them. And just doing what the fudge he liked. Which Lucasfilm were apparently supportive of? Which then seems to deny any sort of plan being in place...
RoS is clearly just a reaction to the (justified) TLJ backlash, which in turn basically makes it a turd because its trying to retcon 2 films and fit a whole trilogy in one movie.