The FO should have intervened!
Just because it's the CA's last day does not mean he can start breaking the rules in the book. I distinctly remember another scenario in an A320 where the Captain came in high, hot, and fast, 300+ knots below 10,000 ft (against their book), too high, and at a low altitude requested an orbit to lose altitude (another against the book thing), got spatially disoriented, and crashed the A320 in the water, killing everybody on board near Bahrain Airport. FO, hired at Gulf Air with about 200 hours, and roughly 400 hours A320 time, did not have the time/knowledge/experience to check his Captain and put a stop to the dangerous sh*t the Captain was doing.