At the cost of the "cartoony" appearance (as you put it), the advantage to the CC3 style is that the maps are very clean and clear (easy to read). You have displayed your art/creativity in the city's design/layout, which, IMO, is very nice. To quote the rep header, "I approve."
Regarding the problems with the path (though you aptly solved it in this case), as you cannot drag the end of the path off the edge of the image, I wonder if adjusting the "cap style" might have solved the problem as well. (It may not have, just a matter of curiousity for me.)