I added tracks in V2 for the dragons so ppl could track them down since they roamed around.
It is ok to get ideas from other games since pretty much everything has been done before, there is really nothing new, just a different presentation, for most part.
The RPGWO way of doing tracking would be to have a skill and EVERYTHING that moves would leave a trail of some sort. It could be a major memory user with very little payback for players. But if monsters/animals would roam now, it could be something the keep in mind for sure.