Hello Dovetail, I've played your games for a long time now and since I live in switzerland I really enjoy the swiss routes in TSW (Arosa line, Luzern-Sursee). Because I often drive the route IR 13 between Chur and Zuerich, I would like to see it one time in TSW when it would be possible. If you don't know the IR 13 line is driven with the RABe 502 train with around 4-8 coaches (4 coaches: 1-2 cars 1st class, rest 2-4 cars 2nd class, etc.). Of course this is not the only route I would suggest to add, however, I will create other Threads for these suggestions.
Definitely a nice choice! There is the SBB route 1 for Train Simulator classic and it’s a really nice route, although it’s really old! I have also been in this corner of Switzerland a few times and I really like the RABe502. What you all have to know is that this line is part wise only a single track line, which makes it a real challenge to be on time. As we all know, Switzerland has a very dense timetable and only three minutes can be a huge problem on routes like this! The trains that could substitute are the RABe523 from Luzern-Sursee but only if branded with the Südostbahn livery (another company)