What if IX makes her the Chosen One then ? (but it would go against the “socialist” view of the movie about the Force which belongs to everyone, no-one included). If you think about it, Anakin was one of the most powerful Jedi of the Order but thanks to Obi-Wan restraints he never got too much powerful (TPM and then AOTC deal with that actually) and then he grown mistrust against the Order (TCW/ROTS deal with that as well). Imagine if he had stayed alone a a shitty planet, would he have become like Rey, very powerful in a matter of days ? (not sure) I agree about Rey nonetheless, it has always been my main criticism against TFA (not even bringing the “mary sue” thing; had Rey been a guy mastering so many things on her own in just a few hours, I would have thought the same about the character).