At first I didn’t understand why TLJ left so little story threads for future entries, feeling more like the final act of a story, than the middle one. In the context of what I wrote above it makes perfect sense. Future Star Wars movies won’t have these connective tissues like in the past, because it prevents the general audience from connecting with it, or worse even go and see it, since they need to have seen the previous entries to fully appreciate the new film. TLJ has eliminated that problem.