I'm in the minority, but I actually liked Alex on TGP, so seeing him on Glee is good for me. I'm glad Ryan brought him in, even though he didn't win. Granted, I think he needs acting classes and more work.
Blake has done quite well and even though I didn't care for him that much on TGP, I like his character on the show. His singing has improved too, IMO. Engaged at his age??? Interesting. I don't understand people in that age range getting married. Of course, Ryan Murphy promotes it for kids on the show.
I enjoyed the Billy Joel episode. It reminded me of how much I love his music.