A reprise of the Mercedes/Santana pairing with them doing a duet on Womanizer. Preferably with Cheerios back up dancers and some form of near naked Puck. I would give a righteous Artie gospel hand to that.
Testify!
I think I would have been happier if Rachel had admitted a little more clearly that she was so incredibly overreacting.
The one redeeming factor the character has is that she's aware of just how overbearing and obnoxious she is. I think what we needed to see there is a little bit more of the terror of what would happen to her if she loses this one thing that she feels is her sole defining factor beyond wandering the halls in a bathrobe with a bowl of Cheerios. (Although I will admit to a giggle that her choice of cereal to viciously chomp on was Cheerios.)
Rachel's just so incredibly tunnel-visioned and self-centered, she does require the emotional equivalent of a 2x4 to get a point across-- Did the writers choose the best 2x4? Probably not. It could've definitely been done better.