I totally agree. As I'm as well Flight Sim fan, a pilot and a hobby scale model ship builder with IT as a profession (designer/programmer/CAD/CAM) I see it exactly the same way.
With a new version of Ship Sim I expected:
1. SDK or any other possibility for community to design environments, vessels, etc.
2. it will add something more to the existing version
...but instead, Ship Sim 2008 is another game, old missions/ships are gone. I really appreciate new features, but I think lot of people expected, well something more.
Giving the community a possibility to design whatever people want or like and easily install it, it will dramatically change the game, making it much more interested - not getting bored of it after few days. And that will be even much bigger advantage for VSTEP, since this can improve their business quite well. Again, compare to Flight Sim. There is lot of add-ons, commercial or free, which are far better that the original planes or environments. Since vessels are quite complicated to design (as a scale modeler I know how much time it takes), it's impossible for a small group of people to design high quality vessels. Instead the community can do a much better job. When I saw a picture of the Pioneer pilot or Deo Volente mini heavy lift in 2006 add-on, they have hardly something more common to the real vessel (of which I have plans and made a lot of photos on board, since I'm building the scale models of them), than the name and a general siluette.
And a last point, since the game has a simulator in it's name, I expected in the future something more realistic - especially implementing at least some features from the real world - like navigation equipment, AIS, etc.. In fact, there is nothing new in the Ship Sim 2008, and I doubt if the simulator is the right word in it's name. So, another wait and see - maybe Ship Sim 2010?