The reform suggested above is reasonable. I would fire, disbar (likely all lawyers that signed off!) and possibly prosecute everyone who signed off on the political repression actions.
Two more big things
1. Disband the DC based CI unit. It's the source of almost all the ‘political actions’ - for example the ‘Russia Russia dossier’. It was set up to fight the KGB. (There's an old saying which goes something like - you become what you hate!) From the beginning it was allowed to take ‘liberties’ with civil liberty because of who its primary opponents were. Set up a federal CI agency that can only investigate and must go through and meet the standards of the US Attorneys and work with local LEOs to arrest. Basically, like how MI-5 operates they only investigate and must meet crown attorney standards and must use a Scotland Yard ‘special branch’ to arrest.
2. End the “process crime trap!” - known as lying to the FBI! All FBI interviews must be recorded, and copies left with the interviewees. Likewise, any notes taken by the interviewing agent. All must be discoverable by the defendant's attorneys. If not done THE INTERVIEW DID NOT HAPPEN! THEN THE AGENT AND SUPERVISOR ARE SUBJECT TO DISCIPLINE, CRIMINAL AND POSSIBLY CIVIL PENALTIES.
Almost all the FBI problems stem from this! Just ask General Flynn!
Big time on your #2.
The fact that interviews are NOT recorded, and the agent’s notes are all that result, is insanity in the modern world. We require our street cops to run dash cams and body cams, and fire them if they “malfunction” or fail to get turned on too often. But somehow the Feebs are immune from this basic oversight? Oh heck no!