Go on.
Other than "A young Jedi named Darth Vader, who was a pupil of mine until he turned to evil, helped the Empire hunt down and destroy the Jedi knights. He betrayed and murdered your father. Now the Jedi are all but extinct. Vader was seduced by the dark side of the Force"
I see no specific changes that make the story veer off.
(If this is a test or opportunity to analyze Star Wars, it's working. )
Han stuck with the Alliance but is about to leave because he has a debt to pay. Luke is still being Luke (he hasn't retired) and is being told by Obi-Wan where to continue his training. Leia is still a leader and going back and forth between Han and Luke. Vader is still being Vader, the Empire is still the Empire. Chewbacca is Chewbacca. 3PO is whiny _____ and R2 saves the day in the nick of time.
Then it expands.
Enough Star Wars DiFabio. Good grief....