A proliferation of illegal unmasking is going to be at the core of all this spying in my opinion. Its going to be more expansive than anyone can imagine. Barr probably has a pretty good idea by now of just how expansive it really was.
Can we just clear the tables here once and for all and dispense with the assumption of discovery? This constant hedging and shimmying by establishment players, including York, Barr, et al is simply nothing more than optics. Everybody knows everything; the crux of the issue is how to manage the fall-out from the attempted coup.
Is Trump a proponent of maximum penalties? If so, then what we're seeing is merely the "meal preparation" stage to prepare the body politic for trials and possibly (one can hope) executions. Or, are discussions being held to contain punishment to only a few figureheads like Brennan, Clapper, Comey, etc?
Historical analogies are very effective, because they communicate via imagery/experience similar case examples. In this instance, I would suggest Yalta provides a useful model. The war wasn't over, yet the allies were already holding discussions regarding the organization of the post-war makeup.
So too Trump - the coup is over, but the dicey parts are how to manage a post-coup world?