One of the major points for German routes and locos is that they are interchangeable. At some point in the future, I'd like to see a full service roster in TSW2 with all active ICEs (1, 2, 3, 3M, T), ICs (1 and 2), and a multitude of local services. That is why I will buy all German routes on locos. Not because I want to drive them all myself, but to have all the rolling stock and fill scenarios with them in a realistic manner. I would hope that DTG will add locos from loco DLC to future routes in the form of additional layers. That way, you can get additional value for the DLC.