Gradine
The Elephant in the Room (she/her)
Does Rey have any flaws? Poe does. Finn does. Their faults are very obvious conflict and growth points (or in Poe's case his flaw is a strength)
She does have those flashbacks and questions about where she came from, being abandoned.
Aside from improved Force skill, does Rey change in any way? She's strong, confident. Does she ever do the wrong thing? Whether she's a full Mary Sue or not, there's signs that she's not getting the full Arc treatment.
Do we ever tackle that abandonment issue? Does it ever come up or hold Rey back?
It's stuff like this that make me question whether (a) we're even watching the same movies (especially TLJ), or (b) people really do hold female characters to different standards. Rey fails at basically everything she tries to do in TLJ until the very end, almost exclusively because of her abandonment issues and the subsequent need to feel like she has some important role to play in everything. She maybe gets Luke to budge a little but she fails to convince him to actually lift a finger to help (force ghost Yoda gives him the final push he needs there). She fails the ESB-esque "dark cave" trial just like Luke before her (fun fact: there's a reason, by the way, that the big scary thing in the dark cave is a mirror. Subtelty this is not). She tries to pull a ROTJ Luke and turn Kylo Ren, but fails miserably in that too, only succeeding in the "well at least he killed the mysterious cackling overlord" part of that particular plan (though honestly Snoke doesn't strike me as a cackler. Palpatine, now, there was a cackling enthusiast).
Hell, even in TFA the whole reason she gets captured in the first place is because Luke's lightsaber strikes her right in the feels and she runs away from everyone right before The First Order attack.
Yes, sure, she starts at a higher level, so to speak, than whiny Tatooine Luke did. But she's experienced plenty of failure. She's had an arc.