This should have been out of Beta a while ago. It is gorgeous and clear. Simple and direct.
I'm not sure how anyone familiar with CC can mistake the impassable borders for anything BUT impassable borders. They are much thicker than any other line, a completely different color, there is a legend describing them, and the gameplay would be shite without them. If someone can't figure them out with a little bit of looking I would hate to see them try a map like Waterloo.