Funny thing about Camaros and Mustangs: They both have similar designs and similar specs, which in essence you could consider a clone, so while they may "feel and look different", you can't necessarily look past the obvious.

This is the problem with WoW clones - People are tired of them. WoW in itself is a mismash of MMOs before it, but games after it are clearly copying it, e.g Rift was a very blatant WoW clone. People want something new and different, which is why they're ready to murder children if you merely mention SQUARE ENIX's last successful MMORPG, FFXI.