Not here you haven't! (as far as I can tell.)Guess this is my only old post about it.
I am not sure how it's unoriginal. I can only think of a few pieces of medium that have ever really tried to depict the "voices" inside someone's head like IO did.
The inside out thing is called Ghost in the Machine on tv tropes.
I can agree with this though.It felt like a knockoff of
Coco is weird for me. When I first saw the trailers, it reminded me of some cartoons that my 3 year old niece watches. So I was expecting it to be some kind of B movie.