Yes there are quite a few loose ends (with even more added in the last moments) considering this isn't mentioned as a series. I'd guess its intended to be the prologue for the next Mistborn trilogy but who knows. Beyond that this is what I have to say of the story. This isn't a western, just think of it as Mistborn with a bounty hunter as the main character with guns and trains in the mix. The provided summary explains as much as can be.
There are only three protagonists in this book compared to the many major and minor of Final Empire (400 less pages will do that.) Wax, his sidekick and a girl who I'll avoid names to keep spoilers out. Wax reminds me of Elend (but less classy and twenty years older). He's interesting, your basic lawman with a past but like Elend spends too much time thinking to be an effective main character but he is. This causes the build up to be sluggish and passively sluggish at that but interesting to see how the world has changed.
His sidekick like Kelsier in the first series is more interesting and I enjoyed every scene he was in. He's also one of the new allomancers, with the ability to slow down time outside a bubble he makes and uses it in a very fun and unique way. If there is a sequel I hope to see more of him.
Lastly there's the girl. She's educated, good with a rifle and around when it counts but like some other female protagonists of sanderson's, sort of just falls into line and most attempts to be remarkable are foiled. What doesn't make sense is that Sanderson does good female characters (in my knowledge and opinion) and there are at least two in this book that are interesting and entertaining. They just aren't first choice as the main heroine sometimes but he is improving in character building.
The magic however is better than ever. As I believe Sanderson said, its not what you can do with magic that's interesting, its what you can't. With no actual mistborn in this novel, there is no one to be the living disaster known as VIn . No devastating force on one side or another (but Wax comes close in top shape). It matters much more here how you use your powers than just how much of them or fuel you have.
The narration is what I expected being a mistborn and wheel of time listener, enjoyable and clear. So as long as there's a another book coming at some point (though I'm tiring of in the air endings) I can easily give this book a four out of five.
(PS- Kill all hopes of having any Kandra or Koloss in this book. The Koloss are mentioned but never explained and the Kandra are never hinted at.)
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