I did think it made for an interesting ballad; in fact, it was the first time I understood the final 25% or so of the lyrics. And it definitely could be read as a commentary on performance, although GaGa's so scattered sometimes, it could just as easily be read as a commentary on man's inhumanity to spider crabs or something. There's just no way that I would have associated that song with Rachel or her Mom. In fact, the one that I would have associated with them (Eponine's number from Les Mis) had already been sung the previous episode (with suitably altered lyrics.) But for those two... I would have had them duel with "Anything You Can Do" or the next-to-last song from "Into the Woods" ("mother cannot guide you/who knows what she'd say?"--the name has totally escaped me.)