The use of the FISA court to spy was both criminal abuse, but also seamless. That surely implies a whole history of past bad acts that no one has looked for yet. This will be necessary in order to properly rewrite the laws involved.
Claiming this is a one off bad act is not enough and must be guarded against.
In the meantime what is happening is the ongoing process of full disclosure and criminal indictment that is now entering the stage of full tide. The process is been carefully staged to ensure public understanding is complete.