The two exams at the end of the two maneuvering courses is really great. There is an objective to navigate to a new berth, there is ships in motion that you have to watch out for and despite the mission not being realistic the scenario around it with traffic and maneuvers is.
A feature that would be really great is to create your own scenarios with oncomming traffic and sort of set up the whole situation (weather, traffic, environment etc.). There seems to be a lot more vessels in these pre-made missions than there are available in free roam. And if you were to be able to insert all of these other ships on pre-created routes so that they'll act realistic these "self-created" missions could be very popular. I hope that this is a feature that will be able in the future!