I've played Arosa line quite a bit now and I can't help noticing that there is a lack of passengers and people in general. Is there a reason for this or have they not been but in?
Yes, this route feels quite ghostly, especially in the Chur area because there are neither pedestrians nor ambient sounds. As for the passengers, unfortunately this problem is not only on Arosa linie, but on all routes, especially on consoles. For example, it is quite sad not to have a single passenger on the train on the TGV. DTG has this issue on a list of things to fix or revise in the future, but not in the near future.