Martin Short was barely in the skits, and when he was, he was stumbling over his words and generally being uncharismatic. There must've been a writer or 10 out sick, because the skits were way under quality. They designated way too much time to the cold open, which was just about welcoming Martin Short into the 5-timers club. It was nice, but it seemed like none of the other 5-timers wanted to be there. It was nice seeing some of them throughout the rest of the episode, but they were mostly there so you could point and say "Look, Paul Rudd!" Hozier was fine, but I didn't care for him singing Christmas music.
