I agree with that statement. When you have a good basic shell (ie. Wow's UserInterface) you keep it. GuildWars even has some stuff that WoW doesn't. But What I am argueing is that World of Warcraft didn't think to put Dwarf's against Orc's. Nor did they think to incorporate quests, and pvp. Nor did they incorporate anything MMO. All they did was for the first time create an eye pleasing experience, when before it was all your imagination.