A couple of things I would like to see changed to improve this simulator- Train doors, if the driver is not involved in the open/closing then a virtual guard/train manager should do it. At terminus stations if the signal is at red/danger then the train should remain at a stand until a proceed aspect, at the moment AI trains proceed along the platform and stop at the signal which is not realistic.
The first suggestion would also solve the issue of having to keep the top-left UI element on, to see when the boarding loading circle is complete and you can close the doors. For people who like driving without the UI, it's one of the remaining hindrances.