I was going to post when the show aired but got tied up and came here to see what people said.
Frankly I am shocked that people here aren't saying that last Tuesday's ep was the worst ep of Glee so far. That's certainly what my wife and I thought:
1.) The song Kurt did was so long and boring, and then April essentially continued it on. It seemed to go on forever.
2.) Not nearly enough diversity in songs, and nothing close to current this week, besides "I am beautiful."
3.) The glee club didn't do a real number together, not counting the final song with April which isn't what I mean. "I am beautiful" doesn't really count either. To me this is a HUGE no-no for show. You'd think everyone episode should have at least one number in their club room where Rachel, Finn, the new guy, and the rest of the cast rock out would be a given. But this ep showed it's not and combined with the other points, my wife and I felt it was the most boring episode of the series and the worst music of the series as well.
I would think if someone was new to Glee and last Tuesday's ep was the only ep they ever saw, they wouldn't continue watching or want to go back and watch the rest of this series. Perhaps in Glee terms, this is a "filler" episode.
Just our humble opinion.