I was never 100% for the RPHS episode. First and foremost, I didn't want a new wave of 12-year-olds buying up all the tickets to midnight showings on RPHS and being super poseurs. I saw that happen with Wicked the musical and all it made me want to do was gouge my eyes out with a melon baller. I also had it ideally cast in my head and the actual casting wasn't the same. Also, if you do the material, DO THE MATERIAL. Don't change anything. At all. It's too much of a classic.
I'm a fan of Glee. I grew up in underdog show choirs. When people gripe about "Oh, they covered this song and it was so awful and I don't know why they do that" it doesn't even affect me. In my college choir, we had these semester requirements called Pop Solos. Not sure why they were called that, because you could do any song you wanted. Opera. Mariachi. Musical theatre. Jazz. Pop. Whatever. I have heard people cover just about everything, good and bad. I guess this, to me, is Pop Solos all over again, and I enjoy(ed) them.
I also really enjoy that the choir is a group of stereotypes working together. Hidden in there is some kind of positive message.
It does help, though, to work at a venue that has served as a shooting location for the show... ;-)