Search or Explore feature for Strava Routes
Map-based exploring/searching for Routes in the 'Explore' section, similar to the map-based segment explore that currently exists.
If someone has taken the time to create a route, chances are that route is a better indication for a good ride or run route than popular segments.
Currently, when I'm in a new location, I use popular segments from the segment explorer to drill down to activities to ry and identify good routes, in combination with popularity in Route Builder and the Strava labs world heat map. It would be nice to not have to create my own route for every location I visit. Local knowledge is the best!