The main optic I think that is missed here is that that this report is not a protection of the FBI against perceived political bias against Trump, but rather answering the question of was there political bias against Hillary that drove the Comey statements and "Gave Trump" the victory.
This report was launched based on Democrats saying that the FBI gave Trump the victory. So in that regards it is very apparent that they were not politically Biased against HRC. They were actually timid towards her. However they are throwing Comey to the wolves for the releases to Congress. Which they should.
The rest of the information has no bearing on the HRC email scandal so can easily be glossed over in this report. This investigation is not about Russian Collusion, so those things that were made public that cannot be white washed are going to be referred for disciplinary actions.
This will surely answer all the future accusation of Political bias charges, by sayin essentially, "The IG has already said there was know evidence of political bias..." even though it is specifically talking about political bias towards Hillary not Bias against Trump.
And now every agent gets a new 20 slide mandatory powerpoint briefing they have to view every year and "poof" they are as good as new. The Staff and leadership stays remarkably unchanged, and we expect a different outcome....