The more I think about last night's show, the more I'm fascinated by it. Throughout the run of the show, we've been encouraged to see Meredith as the glue that holds everything together. The show is even named for her. But last night's episode was essentially saying that it's been Christina all along - for good or for bad. She told Meredith to insult Karev frequently because he needs it to keep him in check. Karev was made more powerful and successful because of Christina leaving and giving him her shares. She told Meredith not to be in the shadows for Derek - and for the first time Meredith stood up and demanded that Derek view her as an equal. Bailey was excited about moving forward and advancing with a seat on the board ... but may have had that pulled back because of Christina. Christina's exit made her that one piece in a toothpick house that when pulled away causes everything else to collapse and rebuild.