That's not the problem.
If you create interesting new characters, people will go along for the ride. The problem is episodes 7 and 8 didn't create new interesting characters. I don't think rey, kylo, finn, poe, hux, snoke, phasma, rose nor holdo are interesting characters.
I can point to Doctor Who, which completely reinvents itself every time it casts a new Doctor in many cases. Look at the first 3 Doctors (Hartnell, Troughton, Pertwee). They did their thing and it was successful. Then they basically introduce a whole new kind of Doctor in Tom Baker and go in a completely different direction and its a wild success. Why? because Tom Baker's Doctor was insanely interesting.
The basic foundation of good fiction can be summed up in 1 sentence. Create interesting characters and torture them for 300 pages. That's it. The sequels didn't create interesting characters.
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I think the most interesting character of all of Disney Star Wars is young Lando as played by Donald Glover. I think you could write some good fiction around him.