Luke has a story in between 6 and 7. Lucasfilm for some reason just hasn’t told it beyond a couple cameos, a comic book and a novel. The sequel trilogy isn’t at fault for that though nor is Rian Johnson. The sequel trilogy is Rey’s trilogy not about Luke. Its not about Anakin either. It really didn’t even need to have the OT actors at all and could even have been set in the far future. Because they do very little at all they were window dressing. They are touchstones of memory. Remember Luke, Remember Han, Remember Leia. Fan service for Gen X fans. Even down to largely following the same style and story beats of the originals. Rebels Vs Empire. Jedi Vs Sith.
The actual world building is shallow and poor. Bordering on imitation. We know nothing about the state of the New Republic, or how the resistance became to be. We no nothing of the origins of the first order or the state of the Empire. And we never see the Return of the Jedi. I hate to say it but the prequel did a better job at world building than actual flavor of the story or likeable characters which the sequel did better. And the OT did better than both. But it was a smaller story and more contained.
I will say going back to the adventure style of the OT was enjoyable actually and i initially really enjoyed Force Awakens because it brought that style of good Star Wars back. It only took me awhile to realize well of course i liked it i love the 1977 film. I understand what George Lucas meant when he said Disney made a fan movie, that did nothing new.
I will always like Rey, Poe, Finn and Rose and i wish the movies were better.