1 Think of the model as a car. If you now paint the car with a custom paint job, it doesn't change the car. It's not that different. There's a minor difference, but the car as a whole has not really changed. It's still the same car. Still the same kind of car. A mass produced kind of car.
2 It is not distinct, it is not seperate. It's a modification of something already created.
• The model isn't the only one of its kind. Many people have added birth and team color to ingame buildings. This practice isn't exactly now. It's several years old. Things like these are stuff you could find in 2004. I myself made similar buildings such as these, because it's a very good modeling training. However, no one would upload them, because no one would approve them. Just like this one wasn't. The files was spread back then using Pastebins, or they may have utilized another means of sending the files, like MSN, Skype, Rapidshare ect.
• It is not unique, as "style of architecture" is Blizzards.
If you need to look up wikipedia to prove a point about something you're clearly wrong about, you're grasping at straws here. Anyhow, I was in the mood to help before, but with all this idiocy here, I'm not really anymore.