I thought the season 2 finale was a bit of a letdown, but more so in the fact that part 2 didn't really live up to part 1 imo. I still think the Star Wars theme should have been saved for an entire episode unto itself, not sprung at the last minute for a series of veeerry loose references (with the exception of Abed Solo).
Overall though? This season had some really great gems. Off the top of my head, the lawyer one with Rob Cordry, The Documentary one with LeVar Burton, The Apollo 13 one, The Dungeons and Dragon's ep, The Conspiracy theories one, The zombie one, The clip show and of course Abed's Uncontrollable Christmas.
But still, every single ep this season has made me laugh out loud and deliver the goods. I'm very much looking forward too season 3.