Becasue the claim is that the guilty plea was obtained through fraud and misconduct by the government, which merits dismissal with prejudice. If the sanction on the government is that Flynn has to go to trial, well that is no sanction at all. That is punishing Flynn for the government's misconduct.
And Powell is in the position that she has new information about government misconduct- that FISA warrants were obtained through fraud without probable cause, which we all now know because the FISA court has grudgingly admitted the fact.
I don’t recall that any FISA Warrant applied here?
They do have Emails that show that demonstrate between Page and Storzk showing Pieztkenka 302 interview notes were re-written after the fact to make Flynn appear to have lied.
(Mispelld FBI aegents nmes I thnk! soryy!)