I would like to add a suggestion for more flexibility with track laying.
not sure if the image got through. In the image i had a 4 lane track set up, the suggestion was that track 1 should be able to cross track 2 and 3 to join track 4 without having to place several crossings. That way, trains would be able to cross over 1 or 2 tracks without looking like a snake and would make mainline network management a lot easier and easier to control the way lines choose a path.