I've been watching Mr. Enter's MLP reviews most of the day, and I can't help but feel that he's full of shit. If he'll hate Putting Your Hoof Down but love Sonic Rainboom, then he's nothing more than a hypocrite.
There's one big reason why it's not a top-ten episode, and Rarity's performance has nothing to do with it. It's the broken climax (Celestia sitting back as Rarity et al fall, for example; if Rarity died, Celestia would've been a pariah).