I apologize for not knowing a lot about your game and how it works. I have read others commenting on how great procedural track forming would be for a Rally game. I agree and I have been thinking along those same lines since the days of RBR.
On the other hand, I like the idea of racing stages that are as close as possible to reality.
Then thinking about your game and trying to guess how your procedural system works, it occurred to me that the ideal track making game should have a "Track Building Toolkit" that works on real life terrain.
For instance, I could take the area outside my city and bring it up in Google earth. GE would show me existing roads, asphalted and dirt, as well as buildings, shopping malls etc. Then the game would allow me to build tracks or dirt roads on the Real Life topography of the area. I can then choose to build a circuit or a simple point to point stage in asphalt, cement, gravel or plain dirt.
Additionally, I could do the same with Urban environment. If you follow Assetto Corsa, you might have seen a track called "Lucca" it's an excellent track one of my compatriots built in his hometown completely virtually. How much fun would it be to be able to do the same in any city? To create a GoKart track in your neighborhood or a GP track in your city's downtown?
Such a system would allow players to bring up locales where Rally stages are already being held and build their own stages trying to follow the existing roads, or create their own stages but following the real life terrain.
We all know a road we like to drive in, how cool would it be to set up Hillclimb races on that road? Or turn it into a stage for your Rally or make it part of a street circuit for GT3 cars?
A game like that would be awesome and I don't think the technology is going to be a limiting factor. Resources, cost and demand are more likely to make it a pipedream then a lack of technology.
Do you think your procedural track building technology could, one day, create something like that?
Maybe if your game would not be able to support such a massive undertaking, how about building a "Track Generator" that can then export the resulting track to be used in your game, Assetto, rF2 and other games? That would allow for a more reasonable price point (for you. Meaning higher price), keeping your game simpler and more affordable. Those interested in it can then purchase the advanced track builder.
Since I am dreaming, let me keep dreaming. How about creating a pacenote system that allows for multiple random voice calls? That too, should not be too hard conceptually. Once the track or stage is build, each segment is categorized by distance, type of terrain, type of turn, etc.
It should not be too hard to create a script and have a co-driver read it so that multiple ways to say "Left Five, don't cut" are enunciated. Some would be inserted randomly, taking into account the last time that phrase was used and selecting it from the other random 4 recordings, but if the car is going too fast for the terrain for instance, then the pacenote software algorithm would switch to various versions of the same command but picked from the "concerned" category, up to the "terrified" category.