I agree thats not a good argument, but I don't like the undead in these types of games. Orcs would repersent the evil side (to me atleast). I shouldn't say that the undead shouldn't be in the game they just shouldn't be there own race/faction (thats too many shouldn'ts). I think they should be a summoned creature.
"90% of what is considered "impossible" is, in fact, possible. The other 10% will become possible with the passage of time & technology." -Hideo Kojima