Thanks! Yeah, I’ve also found it to be super useful. I like being able to see the distance while I’m building it, so I know that I’m not planning something I can’t handle.
I’m somewhat interested in getting them attached to cities, paired with some voting mechanism to bring out nice routes for people who are traveling. I’m also hesitant about the idea because of how these things usually go, with lists of hot garbage. 
The other aspect that would be great to add is some amount of automation. Choosing a starting point and a distance, and letting it build something that completes as many streets as possible.
This is the original #ideas post/thread: Add a route suggester/builder