I'd argue that what makes Star Wars relevant is the small story, about the Skywalkers and the people whose lives intersect with theirs, that happens against the big story, the backdrop of war and rebellion. If you drift too far away from that, in my opinion that's just not Star Wars. It's some other story that happens to have been placed in the Star Wars universe. I think Dark Horse particularly got that horribly wrong, so in that sense I'm very glad they no longer have the rights to the saga.
...That being said, I would probably shit kittens if Rey were Luke's daughter. Though it'd be pretty funny to have a different connection, like maybe a remnant of the Organas, the family that originally adopted Leia, something like that. Just imagine...!