I have doubts about the map as well. I don't know why they thought a small city with some country roads would do it. Hoping there are some challenging and narrow dirt roads though.
I don't know which country the developers are coming from, but they should have made a 1:15, heck, even a 1:10 map of, say, Netherlands, Belgium, or Austria. I'm thinking about these countries because those trucks shown in the game are also common there and let's not forget that, for example, Austria has quite nice mountains, that would surely make up some nice scenery.
I'm not a developer though and I actually have no idea how much time the research would take and building the map would delay the game for about >2 years.