Can he just dismiss the charges altogether on obstruction of justice charges against Mueller and the gang?
If he can, he should dismiss all the charges. The thing is, I’m sure Mueller knew from the beginning of Flynn’s case, that the FBI didn’t go through the regular channels to interview Flynn. He also knew that the agents deliberately withheld the warning to Flynn about lying to the FBI, and he also knew that the 302 report of that interview wasn’t dated until almost 7 months after the interview, which is also not standard procedure. Those things are supposed to be written immediately afterwards. I’d say that any sane prosecutor who knew about those “problems” with the case, wouldn’t have proceeded at all with any charge, because of the probable likelihood that it would blow back in their face. But Mueller went ahead anyway. I don’t know if he thought he could shuck and jive Judge Sullivan, but it didn’t work.
The judge could also invoke sanctions (Think fines $$$) against Mueller & Team.
The real question is, is this judge allowed by the dark forces to rule as he want's to, or is he just following orders.
You'll know that the judge is simply following orders if he follows through with sentencing of Flinn.