I'm not sure I understand what you mean by 'overloaded'. It looks beautiful to me

If there is just one thing, however, its the size and tone of the trees/bushes. I didn't really notice them last time because I was absorbing the glorious detail of the floorplans, but if they are trees then they should be quite a lot larger than they are. They are also the darkest thing in the map by a very long way - in the map being anything not part of the frame or insets. Even if they are cypress trees, and therefore tall thin and relatively dark, I still think they could do with being only a couple of shades darker than the grass just to blend them with the landscape a little more. The spread is a bit too regular - mostly pairs of trees spaced along either side of the road.