S-Bahn Voralberg is a great route with diverse landscape along the route. The only thing is that the only services you can drive are S-Bahn services and EN services (for Hamburg-Lübeck owners). To improve the route I recommend Adding Lindau-Reutin (revives the Lindau region,IC services) Adding the Lustenau-St. Margarethen Line (for example for the Intercity services) Adding the Feldkirch - Buchs SG Line
You forgot about Semmeringbahn 1116 because those segments you mentioned are used by the 1116 in real life. To use the swiss segment theres 1116 201-226 which has DB/ÖBB PZB LZB Sifa equipment with LZN ETCS L1LS ZUB Integra Signum.
