The command of B613 is rather bizarre. We have the CIA, FBI, DOD, NIA, etc. but none of them seems to be onto the B613 team. lol It's lost it's appeal for me. And they aren't done with it. Next they will have to address Fitz finding out who really killed little Jerry.
Oh, Fitz let Olivia's dad back as head of B613 because he promised to take down Oivia's mom, who Fitz was led to believe murdered little Jerry.
When they return next season, some time will probably have passed when we join them. Perhaps Olivia and Jake will have married and lived together for a year or two, Fitz and Mellie have mourned the death of little Jerry and gotten closer, and B613 is back to its old tricks.