Doesn't seem like it would be very difficult to implement and would vastly increase the appeal of this mod, even if an in-game setting wouldn't work and I have to dig into a lua config file to change it.
The dirt paths are created way too fast for my taste and I had to remove the mod. Running in a circle three times doesn't instantly kill all the grass under your feet.
I understand why you set it so fast - it makes sense if your intended use of this mod is to figure out where you need concrete the most, but I was hoping for a more aesthetic use, which would work better with at least 1/4th, maybe even 1/10th of the speed you have it set to now.