First off , yes, I'm a big fan, but....
I've noticed they've started to repeat jokes .For example;
Remember "Who shot Mr Burns " Part I -episode, When the sun-blocker goes up ,all the animals start freaking out in the zoo and we see the Penguins
look to each other , and take flight. Well they then use that joke again in a later episode.
I think it's the one where Apu's kids are put in that show in the zoo, and Apu & Homer go in to steal them back, and all the animals are acting out of character, among them penguins flying round their cage.
I mean , when new writers start, haven't they been watching the show?
(I Still regard the episode were Homer gets hair , to be one of the greatest ,single episode of television history. Big claim I know , but I just think it's perfect.)
...Oh, and don't get me started on that episode were they come to Australia....