I think you over exaggerated too much by saying that the models were incredibly different, they look very similar. A Mario Kart map may fail since Azeroth Grand Prix wasn't that popular and I thought it was the best map I have seen since WC3 was released. Even though it was well made, people complain about anything to make good maps impossible to make. People whined about the turn delay in that Grand Prix map then say it is too laggy or it was poorly made. I don't think the reason why it was unpopular because of the blizzard filter problem, but because if a game is slightly too hard for them, they won't give it a chance.