Since when were covers supposed to show the most crucial aspects of a book/universe? If this series is gonna be 10 books long, there's plenty of chances for us to see a bridgecrew, whatever the heck that is.
And covers don't have to have lots of "movement," either. The cover is supposed to be an icon, not a freaking storyboard. I am totally fine with a dramatic figure pointing a sword over a giant rift in the land. Maybe that's cliche somehow, but I really don't think so. Obviously the "guy with a sword in dramatic pose" fantasy cover has been done once or twice before, uh, times a million, but the quality of the art itself is so good that I like to think that it's less of a cliche and more of a common fantasy cover art idea performed really, really well. It's the really, really well part that has me excited.
In the end, this cover is a million times better than any of the Mistborn ones, and especially that boring Warbreaker one. People who haven't read fantasy for years will see this book at the bookstore and think, "Woah, that book looks epic."
Hopefully, they'll be right.