My problem with Rey is that her development with the Force is mostly level. She starts off piloting the MF deftly, then she pushes back against Kylo's mind probe, and, finally, she overcomes him in battle. Luke, on the other hand, doesn't even begin to mess with the Force until halfway into the movie and even then, it's just him deflecting blaster shots. When he finally taps into it at the end, he goes from a mild skeptic to a full believer. Rey doesn't really have that type of journey.