I smiled at Leonard's costume but since I laughed at it last week in the preview all it got was a smile during the actual episode.
The after party scene saved the Lenny plot, but I just didn't buy it. I usually love Kaley's acting but she really phoned that scene in. It just didn't come across as sincere. She seemed to just be reading cue cards.
I was disappointed in Howard's Sheldon impression I expected Simon to nail it but he missed it by a mile.
The Raj/Anu, Bert and Stuart parts were purely filler and contributed nothing to the episode.
The Howardette and Shamy plot was not at all funny and simply made me wonder why these people are "friends", shamy as Howard and Bernie were just painful to watch.
I give it a 2 out of 10 the last ever Halloween episode was a completely wasted by TPTB and my expectations for the "FINAL SEASON" are now lower than ever.