Here is a visual comparison between American and European trucks and it looks that there could be made some improvement on the American side. For example: transparent windows more detailed tires a few texture updates ...these are only assets, but they can give the American routes a more realistic look and feeling.
The European trucks are definitely the DAF XF and Volvo FH (previous generation) but the American truck looks like a pile of garbage on wheels. DTG doesn't need to have any license for this as with the European trucks because they don't use the name and logos of the truck. In my opinion they should just replace the model with a newly made model, that isn't too hard to do. The trailer could also get some improvements as it looks far less realistic than the European one. Here is a picture of how modern American trucks look like:
That's right, thanks for the support. By the way nice photo! One of my favorite US trucks is the Peterbilt 389 series, which is the 5th one from right. You are also correct with the license problem. That's why DTG can't build a 100% copy of an original truck, including the logo or brand. But I think that they did a good job with the European counterparts, that's the quality level we want to see...
