I feel that one point has been missed in this discussion so far (or maybe that's only the way I see it :shrug
:
I don't think it's that helpful to think about this in track-numbers. Sure it would be possible to create quite a few additional layouts to the existing ones on settings like AS, FE or SO. No doubt about that. But the proposed layout is a good example why it is not necessary, as it effectively
adds one single corner to LFS. All the other turns are already there, just on different layouts. So it wouldn't add a whole new racing experience to LFS. Plus: The devs have probably thought about this way, I would imagine: What layouts could we create that add something new to LFS? Which layout in the same setting would provide a track with different characteristics over the already existing ones? Maybe they ruled out the proposed layout simply because it's not a track with new characterstics, but instead a combination of two tracks with different characteristics?
Just my humble opinion.
Edit: uhm, I guess the point has been raised somewhat inbetween Keiichi's last post and mine, but I was a little late with posting