If the writers were the least bit concerned with realism then Brayden definitely gets expelled, forget withdrawing. And now that he's outed the CourseCorrect app, all the authorities have to do is subpoena the transaction records for the app to bring down everybody. Brayden has immunity but no one else does. That's why it never made sense for Tariq & Brayden to be moving the volume of drugs they were doing during the Second season, there's no way the charges to the app look legit. Also, this should also allow the cops to take down Stern's son/boyfriend who's been working to launder money for Tariq.
And since Tariq's Mom and sister are both safe, he's got no reason to hustle anymore period. Even without Mecca's $2 million, school is paid for, all he has to do is graduate on time and collect his trust fund. And with Zeke dead, that's one less obligation that he has to meet in order to get his legal windfall. Should be interesting to see the Canonical Studies class next year now that the OG professors are dead and the substitute is leaving for Congress.