I don't believe I have shadows either..but I have the newest IPad besides the air. It seems like a good idea, can't wait to see it in the game!
This would look awesome! Would make it more personal. I would like to see different types of roads and maybe mix them up.
IMO, decorative roads is a great idea. It is, however, fun to think about making roads affect movement speed, but I wouldn't use them if they only sped up the attackers. If they aren't pure decoration, there needs to be some reason to use them. Here's an idea. If the defense has "mobile cannon" building(s), the mobile cannons in the mobile cannon building use the roads to move toward the attackers, but they have to stay on the roads.
This is something that I really could see in game Now of course it isn't very functional when it comes to defense since most times its better to keep the buildings jammed, but some people, me for instance, tries to have a really nice looking island. The roads ''idea'' would really give that little ''extra''. And also, those pictures don't have shadows, imagine how nicely the shadows from the buildings would overlay the roads.