Id like to note that every thing the FBI does is also done by another federal group.
We could probally just get rid of the organization as a whole and it would save us money.
Not really. I mean when need the FBI.
The US needs a general, federal, law enforcement agency for lots of reasons. It also needs a strong counter-intelligence agency.
You really do want Counter Intel cabined off from intel as it forces your opposition to double their work. If they want to find out what you know/how they are penetrated then they need to penetrate your intel agency, while if they want to protect their own spies then they need to penetrate your counter-intel agency.
Counter Intel is also a largely domestic affair with a great deal more nuance and delicacy required than what intel demands. It almost inherently has to be part of law enforcement as it (generally speaking) inherently has to obey the same laws as regular law enforcement. I mean what is the worth of the 4th Amendment if the government can just ignore it on the suspicion that someone is a foreign agent?
So yes, we need and FBI. What we don't need is the legacy of Hoover or an FBI that acts (or thinks of itself) as anything like a praetorian guard. And the only way you are realistically going to get that is to gut the upper ranks of the FBI and refill them. Frankly, if it was up to me then the law would be that
none of the top rank of the FBI can be current or former FBI employees. I want the Director of the FBI to be a political appointee with both no inherent loyalty to the organization and no personally loyal support base. Will that occasionally result in the process being corrupted to protect connected individuals? Yes. Is that an acceptable price to pay to ensure that the FBI
can't become a power broker or praetorian in its own right? Yes.