I mean the monster thing and the characters just repeating catchphrases wasn't exactly subtle, but I found it really got great when the music started playing. I may be disappointed at what Simpsons the show has become, but love the Simpsons family still and what is here is satire yet with a heart in it, much like the show at its best.

EDIT: I found this cool blog post on how the couch gag is about dementia.