I’m not going to write him off. If Thornton can simply act as a deep threat he will be fulfilling his role here, and given his speed that’s not a big ask. I would be more concerned if he was expected to be an all around receiver and wasn’t picking up the offense, but run fast and go deep aren’t especially confusing concepts. If you can catch two deep balls a game then defenses have to back off and respect that, and if he can’t provide that much then he will be a bust, but that’s not the case yet.