In looking at this whole situation, UA/Republic should have canceled the flight, and then rescheduled it under a new flight number.
Where UA/Republic is going to get hurt is when the plaintiff's attorneys take discovery and find that various United elites were not included in the "lottery" that led to the passenger being ejected. UA/Republic's explanation about this will be very interesting.
The plaintiff needs to sue UA/Republic in Kentucky; hopefully the plaintiff lives in a rural county outside Louisville. Punitive damages, here we come.