^^^
Yeah, of course I loved the addition of my favorite singer, Sara Bareilles, even though she was only in it for about 40 seconds.
Overall, season 4 just flat out sucked. There were a couple of highlights sure, but overall it's a shell of what it used to be.
I did like that Pierce was made to be likable again finally, but his appearances were so infrequent that it didn't hit home as much as it should have. Perhaps this has to do with Chevy leaving the show, I am not sure.
However, while Pierce became more likable, I feel like Abed became much less likable. He became my favorite show on television for a while, but he definitely wasn't on most of season 4. I don't know if it's the lack of Harmon or the novelty of the character wearing thin, but the last episode before the finale made him out to be a prick, as did parts of the one where he hit it off with the coat check girl. The latter was remedied and he got with her, but of course we never saw her again so who even cares.
There is also something I noticed in a couple episodes but isn't a HUGE detractor is that the morals seem different in season 4, or at least not as well thought out. In the puppet episode when they all told their terrible secrets, they all felt better about opening up and were on an equal playing field. The problem is that Shirley's secret is a hundred times worse than everyone else's put together. Jeff writes this off as "nobody thinks you're a bad mother", but why not? She abandoned her children at a grocery store overnight, all to spy on who she though was her husband. Sure it's odd that Annie rubbed the professor's feet for test answers, but Shirley should be in jail. Another instance was in the penultimate episode, which the show seemed to place the entire blame of Shirley's failed marriage on Jeff. Neither instance really ruins the show, but it does get me thinking about why it is the way it is.