I am suggesting adding "Solo Ride" as a heatmap dropdown option on strava.com/routes/new.
The current heatmap for Rides is massively skewed by group rides. These group rides often involve dozens of people riding together. As such, they are able to safely take routes that would be extremely dangerous for a single rider.
The rides heatmap is essentially worthless for a single rider trying to plot a nice and safe route.
For countless examples of this problem, look at the rides heatmap in Plano, TX.