Note that the OP is about those with insider knowledge pointing out that they see no action.
People quizzed by the FBI or even by grand juries are under no obligation to keep their interrogation secret. They tend to blab quite a lot if the questions are about political figures.
The Sessions-Huber Stealth Prosecution Theory is an article of religious faith, or a kind of reverse Illuminati conspiracy theory. It will morph however it needs to in order to maintain itself.
Yup.
Add to that, if Huber were actually doing any kind of damage to the Deep State, anonymous sources and the media would be giving Huber the Ken Starr treatment.