I agree with TC.
Yes having a ghost car would make it easier & quicker to get faster. But LFS is a simulation. The whole point of it is learning to drive it better, faster. Thats learning, not being led.
As for the example of video footage in real life - we have exactly the same in LFS in the hotlap replays. You can even testdrive the hotlap car. Do you also want to be shown exactly where to drive it?
It would be a step too far.
As for the patent, that's quite scary - they have that well buttoned up. Makes you wonder what else is 'protected'.