This is very cool and very useful as a commuting cyclist. The routes that OSM and Google give me don't always have a high "reasonability" score in that they may be the most direct routes, but the road conditions are very uncomfortable for cycling for any one of many reasons.

One thing that would be very useful is to color the segments on the map based on the waytype. The proportions are given in the summary but unless I already know the route I can't tell where exactly those segments of difficult cobblestone are.