Time's getting short, I'll fill in details later. My flight home on the 20th was uneventful. Today, my return connection in Phoenix, US1551, was originally sold on an Airbus A320 (150 pax). The gate agent was expecting an A321 (190 pax). What arrived was N709UW, an A319 (124 pax). The agents had no warning at all, and had to deal with 70 very unhappy people.