The biggest plot hole in the entire lore, much greater than all this busted afterlife nonsense, is why the mechagnomes went to the trouble of augmenting every part of their bodies, but choose to remain diminutive? Their height is literally the one reason they'll never be more than a joke race.
Mechagnomes are the number one most slept on allied race and have the potential to be the baddest race in the whole game with one simple addition.