When they say \"overdone\", I believe they are actually saying that they are ovedone as a creature that redefines the game. Dwarves, elves, humans, who cares, right? But say that you have a Dragon or you have a creature that looks like a dragon and the selling point becomes, \"They have Dragons!\"
I can guarantee that no one(or very few, if I\'m wrong) are going around saying,\"Let\'s play PlaneShift, they have dwarves!\" What they are saying is,\"Hey, this game wants players to actually roleplay, let\'s check it out.\" Add a dragon, some of those same people will be,\"Hey they have dragons\" or they will say \"Oh, another game with dragons.\" That is why the PS staff is against it. At least that is what I think from what I have heard them say.