In my opinion, it is a very balanced pokemon, very easy to counter. It would be easy to mention the huge list of "counter" that she possesses, so it is for these reasons that I don't think it should be banned. I think very few pokemons should be banned, and we should have numerous "available formats of ranked pvp", making it possible to use pokemons that we could not use in other formats due to the lack of "balancing".