Mickey Mouse has changed several times over since the death of Walt Disney. Books and plays are adapted to film, often without the input of the author, and a film adaptations almost always require significant changes. Sometimes the changes aren’t even necessary— they’re purely stylistic in order to modernize the story.
In fact, most of Walt Disney’s films were books adapted and changed and “modernized” without the consent of the original author. Rudyard Kipling’s The Jungle Book is disgustingly racist and imperialist. Disney modernized the story significantly by removing many of those themes (although adding a few “modern” racist tropes of their own).
No one calls those adaptations “cultural vandalism” though.