I would not be surprised if you see fan edits of TFA where they edit out a lot of Rey’s parent stuff. I think the Rey’s parent stuff in TFA will feel like a drag on repeated viewings. That’s assuming nothing changes on that in 9.
But knowing she really is “no one” and not a Skywalker/whatever blood relative is one of the strongest ideas of the movie (and RJ takes his time to make that reveal, so in a way it’s quite respectful of the material). By making Rey not-Skywalker, he gives the Saga new horizons (I don’t like the Rey character but this idea is great me-think).
If they wanted Rey to be a “no one”, then they could have done that in TFA. There was no need to do a big setup, then in TLJ to throw that away of her being a “no one”.
I would have much rather we know in TFA that Rey is no one. They could have easily and quickly done that in TFA of her NOT being a Skywalker sibling, but a daughter of regular “no one” parents.
What was the point of her being “classified” in TFA?
Who knows, maybe JJ will retcon the whole thing and it will matter in Episode 9?