I gave this a good go. The concept is interesting, but the writing lets it down. I was hooked by the opening and introduction to the Choir. There's a lot to take in here, but I kept at it hoping the book would expand after all this set up. But it didn't, it kept going in the same style. 

It's such a dense stream of Marney's thoughts. She explains tonnes of exposition and worldbuilding, paragraphs of rambling that get preachy at times. It doesn't come through organically, so I didn't take much in. There's too many names and cultures to remember, and it's all told to us instead of being portrayed in the book. 

From what I read (about 45%), the plot is basically non-existent. I don't mind lack of plot sometimes, but only if the characters are well-written. The author tries too hard to make them seem Cool and Badass, but the end result is that they're not fleshed out enough. I can't imagine the characters as real people, nor do I feel much when things happens to them.

The book's structure is so heavy, there's not enough actual moments between the characters. Just Marney's overwritten thoughts, which are too descriptive and detailed. The scenes are difficult to visualise. It got too tiring to read without any change in the pace.