I have to admit that I am, also, gradually turning against Oz reinterpretations. Primarily, this is because they are - almost always - unbearably cynical.
It works like this. Baum write a world that was ultimately innocent - far too innocent for a modern, adult audience - though weirdly compelling nevertheless. He also liked to write over his intended audience's head, with the occasional character whose foolish, selfish, adult behaviors make them a villain, antagonist, or object of ridicule. Finally, in their effort to make the innocent, slightly silly land of Oz palatable to modern, adult audiences, writers tend to either a) darken the setting and characters significantly or b) chose one of these adult-motivation characters as a perspective character.
This is a bad combination. You have a story about a selfish jerk, doing stupid jerky things, in a dark version of a beautiful setting.
This story suffered, additionally, from the problem that it had to make nearly everyone else an absolute moron for Oz's plans to succeed. This is fundamentally sloppy writing. I was particularly annoyed by the conversation with the Munchkin. Seriously, if he was that unhappy, why did he agree to Oz's plan? Why did he kick Oz for "making" him do anything if he was getting paid for his time? Because the story needed him to do it, and needed to make Oz look bad.
The best thing about this story was the reading, which was excellent. The narrator's ability and willingness to "do the voices," as they say, was really entertaining.
The story itself? It didn't offend me or anything, but I basically didn't like it. Just another dark, cynical Oz retelling, dropped several notches by lazy writing. One and a half zeppelins.