The Last Jedi doesn’t stand alone. At the end there’s still Kylo Ren to deal with, and the resistance has been reduced to a handful of people that can all fit comfortably in the Falcon. You might as well say that The Force Awakens stands alone.
Honestly it just sounds like a reason for another Revenge of the Sith edit, which is fine. I like when people try to make it fit the original trilogy.