Nice, but can you explore all of that area in that overworld map? Or is it, in effect, limited to specific areas, like the picture I posted? (Ie, Dragon's Dogma -- huge overworld map, but you were limited to a small section of that. Or the Two Worlds 2 world map -- lots of islands, and one very large one, but you could only explore a couple of the smaller ones.).
Based on the lack of detail (Assuming that it'll be like that in the finished game, and there's no fog.) of the other areas in that overworld map, it looks like it'll work something like the image I posted. As in, you can drive all over the roads in that map, but you can only explore some of the map -- ie, to get from one area to the other (Duscae to another.), you'd need to use the roads, and the only area you can explore (Excluding the linear roads, of course.) in that section of the overworld map is the Duscae region the character is currently in, and to get to another you'd have to follow the linear roads.