I don’t entirely disagree with you. TFA was certainly derivative. I do, however, think TLJ could have done a better job picking up the threads that TFA left opened. But what surprises me most is that there doesn’t seem to be anyone in charge of an overall direction for the franchise.
For example, the MCU leaves stuff open all the time. There is TONS of theory crafting in that franchise. It’s always wrong, but no one cares because it’s still fulfilling (even if it’s not what we expected).
My guess is that if Johnson had made Luke a legitimate badass, fans would have forgiven the many shortcomings of the film. For decades we’ve waited to see that. Let him struggle with his failure, let him be a guarded recluse, that’s all fine. Just, for the love of everything holy, let him be a badass. But nah. He’s gonna get knocked down by a girl with a stick and eventually be some sort of hologram, then die.
I know the middle films in a trilogy are tough, but they can be great. ESB is a perfect example. I think it subverted expectations (Luke beaten, Han captured, Vader is Anakin, etc), but it’s an AWESOME film.