This is a promising start, Warlin! I think the main reason that the isometric icons clash with the rest of the map, is because the linework is very different. While you use thick, and, for lack of a better word, "cartoon-ish" lines for most of the map, the icons use very straight and thin lines. If you drew the icons with the same brush and style as the rest of the map it would probably look a lot better. Other than that, this is already looking great!