I think you misunderstood me if you thought its about the "size" of the map. I really don't care if it is 200km², 300km² or 400km² in size. I'm talking about the scale here.
They let the unit sizes as they are and shrink the overall scale of the real-worlds role-model to 80%. The Results are total unnatural feeling. The textures and the overall shape of the island might be looking a 100% like a high-res Satellitte image, and you get your feeling for the real-world scale when standing there. You start imagine that walking from Hill XY to Hill YZ will take you probably lets say 30minutes, because from your real-world feeling and experience it would be. But as soon as your start moving in the game then, you find out that you magically done it in 10minutes. Its disturbing.