I’m pretty sure you’d have thought Rian destroyed Star Wars to an even greater extent if he had revealed that Luke left his daughter to fend for herself on a desert planet for fifteen years while he hid on a lovely island drinking green milk and crying with his bird friends. Plus any idea that Rey was trained as a child is odd, because if she was old enough to receive significant training, she’d have been old enough when she was left on Jakku that she’d have not completely forgotten about it.
Maybe it’s the (in the British sense, mind you) republican in me but I don’t get the obsession with inherited power. Sure, Luke’s dad was a powerful force user, but we have no indication that Sheev Palpatine, Obi-Wan Kenobi, Yoda, Mace Windu, Ahsoka and so on came from any family background of using the Force. There’s some odd writing in TFA around her knowledge of things like Jedi mind-tricks, but it’s hardly the only instance in the film where JJ writes Rey as if she’s actually watched the original trilogy.
There’s not much point fanediting movies you believe fundamentally have a bad story line, because there’s not that much you can do to change that with the available footage. Rather, it tends to attract people who, as SparkySywer says, believe there is a good story here, and engage in “constructive” fanediting.