I don't think that Amsterdam should be a lagoon tile. I think that this case is comparable to the New York bay. It can be justified to represent the Zuiderzee, but I don't think it fits. The area of Amsterdam is much better represented by a marsh on land than a lagoon tile IMO. Another thing why I don't like it is that the coastline will look weird. The texture of the lagoon tiles make them look like they belong to the sea. (Only a bit elevated) This often leads to weird graphical coastlines. Making Amsterdam a lagoon tile will create a strange cut in the coastline. Venice, New Orleans (with the river fix) and Tenochtitlan do not have this problem, because they are surrounded by land tiles. But all other locations have strange coastlines because of this. I agree. I'm getting the feeling that every coastal city with some kind of waterbody will be turned into a lagoon tile.