There are several problems with this. Firstly, Rey was specifically written by Abrams in TFA as having a secret origin, alluded to multiple times in the film:

“Classified, really? Me too, big secret.”

While Johnson threw all that away, in TLJ it is only established based on the say-so of someone Rey implicitly mistrusts (Ben), and Johnson has since said Abrams is free in turn to overturn his revision and revert to the original plan in Episode 9.

Second, as I pointed out, in terms of the Star Wars universe, having significant force-sensitive parents is clearly the exception – ‘nobody’ Rey is very much the norm in that regard. It’s only because we followed Luke and Anakin (and Leia) as protagonists that it seems otherwise.

Lastly, if you go back and watch A New Hope, Luke himself is absolutely written as a nobody. He’s a farmboy who’s father is a Jedi like Obi-Wan, but this is hardly played as a significant revelation. Like Kirk in the Star Trek reboot, Luke is a nobody from nowhere and his family ties are incidental. It is only in Empire that his paternal connection suddenly becomes significant, because Lucas wanted to deliver a surprise – the ultimate twist.

Johnson wanted to do exactly the same thing, except because Rey’s parentage was set up to be important, his ‘twist’ had to be the reverse. so in a way, far from subverting expectations – as far as Star Wars sequels go – it was actually more of the same.