I too THINK that she is guilty. However, I can see how the specific decision not to bring charges might be reasonable as there is a difference between what I think and what can be proved beyond a reasonable doubt.
What I do not buy is this notion that there is no documentary or testimonial evidence that political bias impacted the pace, tone, and vigor of the investigative tools brought to bear on the Clinton machine (Hillary, Huma, Mills, et al). There is a virtual cornucopia of text and witness statements documenting a softball approach to Clinton. Had the Midyear investigators and DOJ prosecutors conducted this investigation like any other case, someone in that orbit would have very likely plead out or been convicted of a felony.
Finally, Peter Strzok has been called before Congress to explain himself. I suspect that his goose is cooked. No FBI agent can plead the 5th on actions taken during an investigation of their official duties without being immediately suspended pending termination. At the same time, he stands very little chance of saying anything under oath that is going to improve his longevity without it being a load of crap. I predict that Trey Gowdy walks away with his scalp.