1) furry is a community started in the late 70s that devolved into dogfuckers and pedos, they do not own the concept of human animal hybrids.
2)yoh made akko into part rabbit before and it was pretty soul and cute. he probably wanted to explore an idea like that further from there.
3) You should expect it by now that whenever a big title is announced or comes out of trigger there would be at least a couple anime trying to leech of that. (example: Imaishi announces firefighter anime way back in 2017 and there's suddenly in the same season two other firefighter anime)