They also spelled cartoonish wrong.
I don't get their beef with the big shoulderpads. They've always been in Blizzard games, including Diablo 2. The better your armor gets, the bigger and more exaggerated your shoulderpads become. Check out some of the high-end barbarian armors and you'll see what I mean.
That's a screencap of Halbu from Pandemonium Fortress. The big shoulderpads are just apart of Blizzard's style, it's not exclusive to WoW at all.
As for colors, there were enemies every color of the rainbow. In the Arcane Sanctuary, the clan demons were BRIGHT RED. I recall purple, green and blue enemies as well, not to mention they turned neon colors after being poisoned or frozen. Certain armors and weapons were bright colors such as purple, green, blue, etc..
I think this is just a case of people remembering things the way they want to, and not the way they actually were.