I mean if you think Dorsett is not somewhat elusive then I am not sure what to call Brandin Cooks. Because Cooks was multiple tiers below Dorsett when it comes to elusiveness. In most of the WR screens going to Dorsett he made the first man miss. I think you are conflating the routes he is getting with some kind of judgment about his after catch ability. It is difficult to do anything after the catch when most of your receptions are throws towards the sideline or require you stretching out.