I don't care if specifically a race of orcs, elves or dwarves exist within a fantasy game, but I would like to see races beyond just humanoids for a fantasy game. It would be the same as creating a sci-fi space game and all the races were just humanoids. I would be happy with a unique selection of fantasy races such as undead, humans, centaurs, insects, lizardmen and demons where each could provide very unique attacks, skills, recruitable units, and resistances(even 100% immunities).
For example lizardmen might have a natural short range poison spitting attack and undead would have vampires who can change into bats for traveling and drain life from enemies in battle with a bite attack. Now when with only humans sure you can give a human slinger a short range poison attack and another human could have magical short swords which absorb hitpoints from enemies when struck, but it doesn't provide the same level of fantasy depth. In the end 99.8%(or higher) of every game will be won by human races which will control the fantasy realm in Elemental... until some custom content is created. I guess the demons, undead, and other races just lack the intelligence and interest to lead a nation and conquer the realm which is only available to humans in Elemental lore.