I think what gets me about this is Justin Cooper. In a normal investigation he would have been indicted, then get him to flip on Hillary. However we know the DOJ denied at least two requests to expand the investigation to the Foundation. Well Cooper worked for the Foundation and Teneo. Band also worked for both and Cooper worked for him.
The other things that have surprised me are the acceptance of attorney client privilege for Mills, even to the extent that she was allowed to act as an attorney at Hillary's interview, the acceptance of the claim of privilege on the keyword list, and the fact that the name of one of Hillary's attorneys is redacted. And we know that Mills elsewhere got to claim privilege in her own interview.
The FBI did not have normal freedom in this investigation. So I don't think we can say they were neutered and also supported the DOJ's determining the result by rule making at the same time.
However what the FBI does have is information, and they are letting that out. These document releases should be very interesting.