I completely disagree.
Okay, not completely - Rey's a Mary Sue in Force Awakens, but this was reduced as an issue in Last Jedi. And it is a driving theme in both films. In the first, we see Rey's yearning for her parents is what's driving her to return to Jakku, even after escaping the world, and makes Han's death hit harder for her since she saw him as a surrogate father. In Last Jedi, her yearning for her parents is what drives her to go under the island, and makes Kylo's revelation hit all the harder when it reinforces that not only is she a nobody, but that she's been in denial all this time. Rise does its best to mess all of that up, but the sins of the sons don't become sins of the fathers in this case.
We wouldn't need an exposition dump - Rey's parent issues have been laid out at this point. You can even plumb Rise since she's the granddaughter of Palpatine, and the daughter of a strandcast. Even if you needed to get some characterization/info established, you can do it through character interactions. As for the Jedi, you're referring to the old Jedi Order, there's no reason that a new one would have to follow suit (and if it plumbs Legends, it wouldn't). That in of itself is a position of potential drama. I can't say I'm fond of Rey rebuilding the Jedi, in part because Luke's already tried that, in part because there's nothing to suggest that her attempt will be any different from his, but that's the hand that's been played.
Will this happen? No guarantee. Can it happen? Yes. Am I confident? Not really, but nothing's without potential. I mean, Disney's run of Star Wars has been a mixed bag, but as bollocks as the sequel trilogy turned out to be for instance, something like the High Republic is good. Roll of the dice and all that.