Looks good TFM.
If it's freight only it would almost certainly not be double deck or double end loading, I would consider losing the bow door / cow catcher and the cat flap and replacing them with internal ramp between main and upper freight decks. Making her stern ramp only loading (didn't notice does she have a ramp or a door? a freight ferry would normally have a ramp)
Is she going to carry drivers as well or only drop trailers, accomodation looks about right for somewhere in the region of 100 drivers.
A freight only ferry wouldn't have 3 screws I would ditch either the centre or the 2 outer ones.
Bow rudders are evil, make it go away, it gives me cold sweats.