I think it would be cool to have tramp steamers plying routes between a country's ports. (And I'd like the ports to look more like actual cities, too - for added realism in the terrains).
Hunting freighters would be another unique type of thing to do in the game, different from furballing and base capture, but could still contribute to your country's war effort if you find and sink freighters. And it would give us a reason for to have the PBY, Fw.200 Condor and an Emily, too.
EDIT: I think the steamer's AI captain should be smart enough to out-maneuver attacks from high altitude level bombers, too.
