Looks ideal for operations, a dedicated freight only train each way would work. Perhaps Arosa to Right storage area. Perhaps at beginning of session Right to Arosa with those wagons gravitating around the line and others gravitating to Arosa for that goods at the end of the session. Wagon cards and waybills a must to move wagons about to logical destinations. Waybills having different colours to depict urgency or particular working. My line has 4 way waybills front to, revolve, turn over, revolve then remove at final destination for new waybill.