To me how McDougall goes depends on Darcy, and what the Bulldogs want from him.
If Darcy can stand up and hold down FF, and between Murphy and Johnson they have that leading forward spot taken care of, they can play McDougall as a third marking forward and he may well stretch teams.
If the Bulldogs are worried about Darcy's knee, or want to slot McDougall in as the FF to release Johnson to the midfield, then he will be matched up against the likes of Glass, Scarlett, McPharlin, Michael etc and one would imagine he'll struggle.