Adding more Swiss routes that aren't RhB would be superb! The Zentralbahn network is perfect for TS. There are two routes, both the perfect length for a TS 'map'. There are a variety of trains used on this route, both current and historic, which would again be ideal for expansion pack DLC like we saw with the RhB routes. The route operates a perfect mixture of city commuter line, express and mountain railway, with incredible scenery. The rack railway would also be a great thing to see in TS and makes the line all the more interesting. The stretch from Luzern - Meiringen would be my main recommendation. Contains the suburban routes of Luzern, the scenery and rack railways of the Brunig Pass and lasts about 1 1/2 hours over no more than 50KM. An extension route along Lake Brienz to Interlaken Ost could also be included, as well as the second route operate by the Zentralbahn, that leaves the main line at Hergiswil and heads up to the Ski Resort of Engleberg. This line is about 50 minutes long and again perfect for TS!