Unless I've missed something, I've noticed the layer selection always resets after quitting the game? Would be nice if the game would save your layer selections, so it would remember what you've unchecked.
Absolutely agree with you there. Some routes are so badly cursed with the DTG signature stutter and frame rate drops that disabling most or all of the layers is the only way of running timetable services without destroying the immersion factor. As you state, it is really tedious having to do this every time you restart the game and some of the routes have many different layers that need to be stopped which becomes extremely boring and time consuming. Having each route automatically saving the state of layer selection would be a huge quality of life improvement and very welcome.