I am half surprised that a flow isn't desirable because if someone is truly a safety concern or a "crazy" a flow would mean;

1. No longer PIC of Delta pax, but an SIC and

2. back on probation where they can shape up or ship out.

I don't relish good people losing their jobs, but if a pilot is a bona fide concern and basically it is just the union protecting their job, maybe being an FO on probation isn't such a bad thing. ???