@Egika, that is true, however in the suunto app on the watch you have the abiltiy to show these maps in their heatmap form and thus be able to run the route shown, but as Rob33 has pointed out some of the lines are really thick making it difficult to easily see the potential route especially if there are multiple lanes that are reasonably close together, requiring you to zoom in to a level that doesn’t work well from a navigation point of view.
So while specific to the watch face, a valid point from the tracking side of things.
@Rob33 - the only issue I can see with thin lines is how to show level of use - which I do think is very useful and a very important part of the tool. As I don’t think you can see all the heat tracking for each activity on the same map, perhaps thin lines and colour could determine level of use i.e. Red for very active, green for barely used etc…