It wasn't good, it wasn't bad.
I still stand by the idea of the high schoolers returning being really weird. If I ran the show, I would have just written them off the show after graduation and only made references to them in passing. That or split their college lives into a spin-off.
For some reason though, it didn't feel like a terrible episode, despite their overbearing presence. Probably because I thought it was a kind of refreshing perspective to see the old kids vs. the new kids.
It was pretty boring, overall though, but there was nothing offensively bad. The only interesting part was the ending with Marley fainting.
Pretty standard sub-par season 4 stuff.
GRADE: C