With Rey I think it's the lack of defined traits. Like, Luke is the Jedi, Han the pilot, Leia the brains, Chewie the muscle, R2 the hacker, 3PO the translator, etc. -- everyone's got a specialty and they all really struggle against a problem that skill doesn't apply to. Rey gets into a jam and just suddenly is able to solve it now. Even Anakin's whole Chosen One thing didn't grant him with much more than an ego; indeed his whole entire character arc is all about what he can't do. I'll always be disappointed by how it wasn't Rey the Force-sensitive sharpshooter and Finn the non-Force-sensitive swordsman. That'd have made for an interesting dynamic, I think. I'm curious if there's any actual proof of this. Everyone shares that anecdote of Harrison Ford wanting Han to die in the OT, but I dunno if I've ever seen his actual thoughts going into TFA. I'm tempted to think people just made up this notion that Ford was obsessed with killing off the character.