Basically, yeah. Because you know they'd all be like "Doing the musical episode: not ambitious enough! Let's do THE WHOLE SHOW onstage! This is how we win!" Old habits, storyline comes in a distant second to MOAR SONGS. (And there's a lot of Buffy scuffling. A whole lot. It's probably Quinn in the end because she's pretty/can dance/Dakota Stanley is not that imaginative, but it's definitely preempted by like a month of Jesse going "we need someone distinctive, a real female soloist powerhouse," and Giselle rolling her eyes and stopping him to tell him that Barbra and Buffy don't mix, dude, so stop hinting about Rachel Berry already.)

I did not cast an Oz, but I can safely say he would be Josh Roth (aka played by Wesley Quinn, the slightly starstruck freshman who's more talented than anyone will tell him to his face).