They aren't "preconceptions". A preconception about the book would be if they hadn't read it, weren't familiar with it, and had opinions about it anyways. Flash Boys is a bad book. I'd argue that your desire to immunize the book, which is largely unrelated to your paper, from criticism is harming the case you're trying to make about distsys flaws in DEX's.

The paper is good! The surrounding context you're trying to provide about how real-money markets work, perhaps not so much.