Originally Posted by
Frood
Although I don't think the 4chan "leak" is real, there are plenty of examples of uncomplicated concept art from Blizzard. Here's an example from Val'sharah in Legion:
Concept art serves one purpose: To explain an idea or an aesthetic to the developers, prop and/or environment artists. If a 5-minute sketch can do that, it's technically concept art. If a dev gets a cool idea and isn't good at drawing, but wants to explain their idea, it's still concept art.
Not really a valid argument either. Concept art is made by different people. If anything that proves it isn't made by the same person, thereby increasing the authenticity.