Allison Brie, santa costume. Gillian Jacobs, skintight jumpsuit. No coincidence that I enjoyed the hell out of this episode - oh, and it was really funny, so that helps too - but I have to wonder what in the world this show has to do for better ratings at this point.
Sometimes I suspect NBC just has trouble marketing it because it's such an ensemble show with no real big stars to anchor it. Joel McHale is great but I don't think he registers quite as high on the fame scale as Steve Carell, Tina Fey, or Amy Poehler.
Also, even in this era of DVR, being on opposite The Big Bang Theory
can't help, particularly because I suspect they both tap into the same type of nerd audience.
EDIT: Oh! Another ratings idea: Britta/Annie 'shipping!