Strava is often unideal for touring, because its recommended routes are where all the local sports cyclists are forced to go due to their thin little tires and lust for speed. Tourers might have thicker tires and so be comfortabke with less smooth roads if it means avoiding cars.
That is a good point. I have seen Strava prefer a higher traffic road near me and I then manually adjust that portion. It would be cool if Strava could provide some sort of "Avoid vehicle traffic" preference when route building.
