Hello! Please do not stop this feature ;-) I had this question a looong time ago here in the forum, but I was told that you will not implement that, so please stick on this topic and make it an option as mentioned above.
I fly from Austria to Germany, Hungary, Slovenia, Croatia, Czech and Slovakia regularly and I file flightplans with city names for every flight and I never had a problem.
So please make this option as mentioned - that is a big feature for us here in central europe. Btw, I also asked an air traffic controller from Austria and he told me, that they hate the skydemon style with its coordinates, but they cannot do anything against ;-)