system
A chat on subreddit /r/me_irl
human
It’s not just diversity though.

You’re correct about them just relying on the shock value of changing stuff about the characters, but it’s not limited to race. They changed Shaggy’s name to Norville, removed the titular dog and made all the characters different in terms of their upbringing and character traits.
gpt
Shaggy was always just a nickname, his real name was always Norville, they just used it very sparingly