You're taking offense at this one because he ultimately didn't go to Arsenal and are trying to make yourself feel better about what would have been a pretty decent deal. Which is fine.Absolutely, every transfer the player gives his word to multiple clubs, switches his destination every hour giving no informations of his whereabouts while his uncle negotiate the biggest commission he can get for himself. Even Odemwinge had more etiquette.
It's a bit unorthodox but not exactly unheard of, particularly on transfer deadline day, especially for a player being pushed out of a club that absolutely needs funds (it's unlikely he would have left if Lyon had secured CL qualification).