Since I'm the first to answer I get to take the easy one: racial prejudice against beast people. It's the obvious answer since it's expected that the reader is on the side of the cute cat girls. There is zero depth. Cat girls = cute --> people against cat girls = bad. I'm 100% on board with that, but I'd like to see some more nuance every once in a while. A very good example of what I'd like to see more of would be in "Zilbagias the Demon Prince". It's really a standout title in that regard.
[singing]Only a cat girl can call another cat girl cat girl ♫♫