FBI doesn't really care what little people think about them. The judicial branch is virtually a rubber stamp for the DOJ. There is almost nothing they could do that is egregious enough to change that. If they framed Gen Flynn, falsified evidence, withheld exculpatory evidence, performed illegal searches, or anything else, then it was justified, oversight or a mistake and had no bearing on the prosecution. "First we F#%$ Flynn, then ..."
Solution. Fire Wray and put Flynn in charge of the FBI. Drain the swamp.
Who said “First we F^*K Flynn, then....” I can’t remember who that quote is from.