The question is not how many catches as how many targets. I think Dorsett has a chance now to contribute while Hogan is out. I can't remember the exact source, but I recall someone who should know said that for some reason, Dorsett isn't really a deep threat, despite his obvious speed, HOWEVER he is explosive as a YAC receiver.
That comment made me think he is a perfect opposite from Cooks, who has been extremely effective as a deep threat, and hasn't shown much as a YAC guy, Perhaps having both on the field at the same time, they can be a very effective duo.