I would love an option to save a route or favorite it, not just a destination. Once I was rerouted through a backroad due to bad traffic, and really loved the drive. It was pretty with a very similar ETA. I later wanted to go that route again, and wanted to check and compare the ETA of that vs another route, but the route was not listed later on. I would love to be able to favorite that route and be able to compare it against the other route suggestions.