Even if historic levels of shipping in the ports would be too much strain on the game engine/our PCs, it sure would be nice to have at least some (even just 1-3) ships in the ports - I found myself right outside of Aberdeen last night - first, I sat submerged just outside the port all day long, but there was no sign of traffic in or out of the port all day, so just for the heck of it I decided to head in after nightfall and take a look - absolutely nothing anywhere in the port
I had been shut out on the entire month-long patrol up to then, so I was really hoping to find something in there to spend my last couple of torps on - at least I found a coastal freighter somewhat further down off the coast of England in a rare moment of reasonable weather (only 6m/s winds) and gunned it to death (after wasting yet another dud torp on her - story of my whole patrol in a nutshell), so I managed to avoid posting a big goose egg on the board back at base