An interesting comment from the original thread was:
It would definitely be interesting if paths/ roads developed on their own - the most frequently trodden areas turning initially into dirt paths, which are then through more use upgraded into the packed dirt/clay you suggested @Lomico, then again depending on the thoroughfare can be upgraded into either arterial roads or collector roads (yes I’ve just been on Wikipedia and am amazed at the classification of roads).
Essentially I’d like Stonehearth to become Road Simulator 2K14.