I don't really get why Memetic Mutation is a YMMV Trope. I think it would make more sense as a Trivia trope, since it's not really a subjective fact if something becomes a meme.
There's a common consensus that SpongeBob hasn't been nearly as good since the movie/the start of Season 4. But are there any that you like from the post movie era? For me, the first one that comes to mind is Dunces and Dragons.