Stormlight has two books finished out of a planned ten, right?
I can't trust any of these new epic fantasy novels or massive novels whatever u want to call them because since the recent success of Game of thrones, all these publishers are pushing for the next big thing, so we see first time authors and little experienced author's trying to make these massive fucking novels and it just doesn't work that way. George RR Martin was already a well established writer and it took him years to get to that point, and even then it was never meant to be this fucking big, it just got way out of hand for him.
There are very few writers that can really pull shit of this magnitude off. Most of the new ones just can't compare. I've tried getting into a few, read reviews saying so and so is the next GRRM, fall for the hype and it sucks! GRRM didn't invent this of course, there have been plenty before him, but he's popularized it in recent years. So we're seeing a wave of young authors getting contracts to write ten novels and shit, and it's just too much. There are pleeeenty of good ones that are already finished so I would suggest researching ones that are considered greats and start from there.