I don’t believe Ren about Rey’s lineage.
I don't either. Ive always assumed she won in TFA because he knows who she really is and wouldn't Slaughter her similar to Vader fighting Luke on bespin. If his statements about her parents are true from this movie verbatim then they got a pretty dumb plot hole going on.
I took it like this - it's all about point of view. If Ben Solo were to see his Great-grandmother Shmi Skywalker in a vision w/o the context of her being his Great-grandmother, how would he describe her to someone if he wanted to be cruel? Probably as a "worthless slave" (or similar).
I think that is exactly what Ben was doing there, trying to bring out her anger at the insinuation that her parents were scum.
What if, just like Anakin was born of Shmi via the force, Rey was born of her mother via the force? It's also entirely possible with how strongly the Dark Side calls to Rey that perhaps, just like it was strongly hinted at that Darth Plagueis manipulated the midichlorians to create life, what if Darth Sidious had learned how to do the same?
At that point, where Rey came from is just as unimportant as where Anakin came from - and a name is just a name, the cycle continues and the force seeks to create a balance.
The more and more I think about
The Last Jedi, I feel that more and more people are going to come around over time to the opinion that it is one of the best Star Wars movies ever made and unlike the PT which had at times a very cookie-cutter approach to the plot, this was the movie that allowed for movies about Star Wars to be de-focused on the Skywalker lineage. You can't keep going back to the Anakin/Darth Vader/Luke well - you just can't - this movie took the hand it was dealt from
The Force Awakens and essentially smashed the well.
So yeah, the Force Vision from Maz's castle is probably going to be a HUGE misdirect. It's entirely possible that what she saw was a vision born of traces of force energy left behind by those who were in possession of the saber.
And at the end of the day, I applaud Rian Johnson for breaking the saber during the climax of the Rey/Ben duel. The saber itself merely has the distinction of being Anakin's at the end of the Clone Wars and the saber he was wielding when Obi-Wan defeated him on Mustafar. When Obi-Wan gave it to Luke he romanticized it's origin and why he was giving it to Luke because you don't tell someone's son "hey um yeah, so the last time I saw your father without all of the mechanical stuff keeping his burnt husk of a body alive, was when we fought over your mother on a lava planet and after I cut off his legs and remaining flesh-and-blood arm, I took this from him" - doesn't exactly have the same ring as "your father wanted you to have this when you were old enough, but your Uncle wouldn't allow it".
So while not as "in your face" as the ANH/ESB twist was, the TFA/TLJ twist was more refined:
ANH - Darth Vader killed your father
ESB - Darth Vader is your father
TFA - Kylo Ren betrayed his master Luke Skywalker and destroyed the new Jedi Academy
TLJ - Ben Solo destroyed the Jedi Academy because Luke Skywalker failed in controlling (and eliminating) the darkness growing within Ben
I am genuinely excited to see this movie at least four or five more times before the end of the year...