So I've thought of many ways you could add things like ILS to the game and I just found the best way to do it with the least effort:

So the AI aircraft often attempt landing at airports and 40% of the time succeed providing the aircraft is easily flyable/has good manouverability. So how about creating a mod that allows you to switch the autopilot from "wing leveling mode, to autoland mode???" Shouldn't be too hard to make this mod right? And maybe add a few extras such as entering a heading for the autopilot etc...