I was so surprised that people didn't think this episode was funny! Oh my goodness! This is such a good reconnection with the humor of Season 1, the beauty of the real 30 Rock! So, so good.
Maybe try watching it again. Just relax a little and let Jenna's crazy, Liz's neurosis, Jack's elitism and Tracy's oblivion of reality allow you to laugh and love and enjoy the rich social terribleness that America loves to force itself into.