My PS4 has HRR, I also have MSB, RSN, and a few other german routes that add layers. With these, I can drive more than 6 different trains, when substituted for HRR, from other routes. But why is HMA more limited?? If HRR did it, why cant HMA?
HMA is a bigger route which holds more trains at any one time, along with a substantial increase of track & scenery assets.