>>99923070Generally agreed that the show declined in quality drastically during the second-half of season 5.
Penny is unshelled and is now Gumball's girlfriend, but is also now insignificant when compared to her shell form. She got her own episode though, so that's cool.
Show develops a plot about a purgatory of sorts for abandoned characters and ideas. It was dropped for the entirety of season 5 I believe, and was brought back recently. It appears this will be Ben's end game for the show.
Carrie purposely gets cucked by Teri, but eventually gets the fishstick she desires.
Rob becomes a villain for season 4 and is related to the purgatory mentioned above, but isn't really a villain anymore after status-quoing himself to irrelevancy.
Nicole gets an episode that describes her life and how it could have been different. Retcons out the ass apparently, and it makes her look like a psychopathic Stockholm victim instead of a sweet mom.
Main family undergoes Flanderiazation, side characters are irrelevant or poorly used.
Animation declines drastically.
References become much more apparent and distasteful.
Has a really sweet and charming song that describes the show wonderfully, but that peak happened at the end of season 4. It has almost been a year and a half now, and that peak really hasn't been surpassed.