I was just ranting on this on facebook.......
Okay so we had "Return of the Jedi" back thirty odd years ago,Luke was supposed to be the big shin dig who brings all into balance....then we get seven and everything went out the window which I can tolerate but now "The last Jedi"???? AGAIN! I can see a new tale with their kids/new cast but this basically saying six meant nothing and the old story ain't over yet.
Lazy writing is what it is me thinks.
Technically Anakin brought balance to the Force when he threw Palpatine down the shaft. I think, like people have said, ROTJ is a title with two meanings. It refers to both Anakin and Luke. The Sith are gone for the time being. I don't think any of this says the OT story isn't over. Well unless they do something very stupid like Luke not trying to recreate a new Jedi org.