For the normal Class 66 freight services, the pink containers kind of kill the immersion for me. We need more freight services that look like this. Muted beige, brown, blue etc. I understand that cargo line 3 just came out but the bogies are incorrect for what I usually see.
You are correct, BUT... It's the names on the containers that could or would cause an issue, and licencing that would have to be acquired, which would make for better realism and immersion. And for that reason, why it is the way it is, there are a couple of mods that do make some changes, but I don't see DTG going that far with the containers. Add some still images of the bogies you see, and compare them with the in-game version, and add them to your suggestion.