Everything after season 5 is hollow, like the jokes are being written with a laugh track in mind. Its just not as clever. This season is no exception.
Consider Old man Waterfall defending Zoidberg: "I request a Satanic funeral." "Boooo!" This the culmination of a running joke about American freedom values to "do what you want, but not like that."
To season 6 opener: "Professor, my Fry-fro..."