Bingowings said:
Maybe some of these things have an in universe explanation which we haven’t seen yet. Rey could just be absorbing skills from the minds of people around her. She knows the Falcon because Han and Chewie do, She knows how to fight with a lightsaber because Ren has been train to do so. She understands Chewie and BB8 too so she can draw skills from non-humans and robots. It could be a new Force skill where connective nature of the Force is being used as a tool.

I like that idea. She has to be drawing the knowledge from somewhere and clearly it’s being kept from us for a couple of years. I also really like the cryptic exchange between Luke and Rey. He doesn’t appear to be glad to see her, but really it’s hard to tell if they even know each other.

Again, I’m happy about all that was left unsaid in the end scene and elsewhere. There were all manner of things left unexplained in Star Wars and Empire. They worked for me in that regard. The universe stayed vast and mysterious. It was the last four Lucas films (at least the two I’ve seen) where he started with the leave your imaginations at the door direction of the story. Taking the mask off of Vader in Return was where Lucas took the mask off the franchise. It’s where I knew I’d be making my exit.