I agree that Luke didn't need to be the star of the sequels. I-III were Anakin Skywalker's story. III-IV were Luke Skywalker's Story. So IV-VI should have been the story of the next generation of Skywalker. It's the Skywalker Saga, not the Luke Skywalker Saga.
I think the tug of war over the sequels robbed it of continuity so it didn't really fit with how the rest of the saga went.
I don't disagree. I think JJ and Kasden missed an opportunity. Let's take the same general framework, this is a very loose outline, needs tons of filler.
Ep VII, Luke has 2 star pupils, Rey and Ben. Rey showed off her exceptional ability in the force despite not knowing her family. Ben is Leia and Han's son, turned already to the dark side by Snoke. One day Snoke and a legion of first order troopers raid Luke's temple. Big epic Battle, Luke and Rey and the academy hold their own until Snoke orders the heel turn of Ben and Ben attacks Luke. Luke defends himself and he and Rey go on the defensive as the First Order over runs the temple. Luke leads Rey out to a passage, to his old X-Wing. He collapses the base on himself, Ren and Snoke in a last ditch effort to end the first order which ultimately fails. Other resistance vs. first order stuff happens of course with the non-force sensititives. Episode VII ends with Rey meeting up with Leia and Han and telling them of the fall of their son.
Ep VIII has Luke telling Rey to seek out a former Jedi master in exile, which leads in the end to Ahsoka. Ahsoka is not Yoda though, she is jaded by the Jedi order. She teaches Rey how to effectively battle and still be at piece but never preaches the risks of fear and attachment. Leading to a Mid movie battle between her and Kylo where Kylo slices off her left leg below the knee cap when she wasn't prepared. And her needing to be rescued by Han and Leia. Han attempts to sway his son to return to the Lightside and Ben agrees to join, them, on a resistance ship, he turns again and goes ape ****. Only for Rey with a repaired leg who's been talking to Leia about the importance of being in the moment and Leia stand and defend the ship from Ben. Ben kidnaps Rey and brings them to Snoke's ship. Snoke attempts to turn Rey but she resists. Han, Leia, Chewie and some others break onto the ship. Han goes about disabling the shields and some of the cannons on the ship with Chewie While Leia and Finn go to rescue Rey. In the Throne room lots of dramatic tension blah blah blah leads to Snoke being killed by Ben. A conflicted ben goes to leave the ship with his head down and meets his father, as he is about to enter the room with his father who's reaching out to hug him a grunt gives him a salute and he realizes he can fulfill Darth Vader's plan now, and he executes his father. Embracing the darkside, becoming what Palpatine wanted Vader to be. Chase scene to finale.
Ep IX is all about the finale. Big battle fought against the first order. It starts with Leia sacrificing herself to save Rey, something that pisses off Ben to no end. Movie goes on. Rey at her low point is visited by Ahsoka as well as speaks with the Ghosts of Luke and Leia, inspirational **** happens of course. Here's where whomever the ancillary villain comes in. If you make it Hux, great, if you want it to be the Knights of Ren, fine. These hyper focused Villains are ravaging the last base of the Resistance. Leading to Ahsoka, Rey, and the main characters to mount a raid on the First Order blockade. Ben is distraught because his mother sacrificed her life to save someone he's always resented. He winds up meeting the force ghost of Anakin, who first appears in Darth Vader disguise before removing his mask and being Hayden Christensen. Talks about all the Darkside took from him. It gave him power he couldn't believe but made him into an island. Cut back to the heroes last stand, fighting off a legion of first order troopers, some light mechs, etc. As things get perilous Rey steps to the front and projects a force barrier, stopping the attacks. Giving her friends time to escape. She grows weaker and the shield grows weaker and she ducks behind cover. She centers herself, we hear a lightsaber ignite, and pan bakc and Rey is looking stunned as it isn't her. It's Ben turning yet again (something about this multiple flip flop is horrendous but man it seems funny) and Rey joins him while the rest of the resistance works their magic. WE get a final scene of Rey and Ben fighting to the Bridge where the ancillary villain is there, scoffs at Solo and calls him a traitor. Solo tells Rey to let him finish this and she looks at him cautiously. Film ends with Rey rescuing her escaping party and them all being picked up in the Millennium Fanservice, with Kylo Ren doing the thing he likes to do and destroying computers that causes the mothership to become disabled and it is destroyed. Skywalker saga comes to an end with Luke revealing to Rey that she like Anakin was a correction in the force, someone willed into existence to correct the horrors Snoke was unleashing in the Unknown Regions.
That was with almost no pre-thought so pardon the badness. But stream of consciousness writing i'm pretty sure i did a better layout than JJ's layout.