We try, but it's a great amount of things you have to do for a mission to be dynamic because you have to check all ships to make their way and don't run aground (the AI is incredible stupid in those cases), then, you have to make sure that all the times you play the missions the ammount of ships are not too less or too much, try to predict the players behaviour (you are very imaginative! I have received mails saying that in one mission I created was possible to sink a sailboat without consecuences
) :rotfl:
And there's also the mission idea, the designer wants to make specific things, so there isn't much room for dynamics (the airport must be there).
Believe me, many of the missions you have played have dynamic things, maybe the biologics are in different places, the civilian traffic varies...