I have no problem with the inclusion of elves, orcs, and dwarves and all that, but I think if you're going to do that, at the very least put a spin on it, or add a substantial amount of original creations to place with them and balance out what you already know will work with something new. It doesn't even need to be anything terribly thought out, like making golums or gem people a standard sentient race rather than an occasional monster.