TBH, i fully expected HRC to be charged with a misdemeanor like Patraeus. What the FBI lacked was an intent to misuse classified information. They had Patraeus on tape telling his biographer he was giving her his classified notes and admitting he shouldn't. No smoking gun for HRC like that.
She should have gotten gross negligence for the e-mails.. Setting up an illegal server should have had her thrown under the jail.