Rfactor is what it is for the mods and circuits that some fans and not so fans have created for the game.
I do not think the mods to improve LFS or new tracks, but new tracks.... it sure would come with some variety.
Currently there are many programs for editing in 3D, some free and very powerful as Blender, many circuits and road sections made Rfactor fans are better than the original tracks.
I would not underestimate the moders, RBR is alive thanks to the cars and tracks that do not stop rising Internet
I think it would be a hit to open the door to the circuits of the amateurs, and it would be a good test for the sections on Dirt.
It is not the first time you talk about this.... is not the first time that I talk about this subject in this forum and I made few speeches, I'm afraid I will haven't luck this time either (next year I'll try again), but know that I am learning to use Blender to create circuits and I hope that one day my dear LFS me let upload my own tracks, as I do now in RBR.
Greetings