We should note that the humans need to have reasonably constant proportions. And in magitech, the humanoids all have the same base model (and for a good reason: consistency). Most of the variance will be in the texture. I'd rather we don't use different models from different people because they'll likely end up in very different modeling and animating styles, leading to a very noticeable inconsistency. Professionals use very rigid style guides, but I don't think we have the skill or time to do such a thing (which would define everything from how wide the nose should be to the ratio of the waist to the thighs). The Simpsons wouldn't look very good if every episode, Bart had different proportions, would it? Likewise, using the same base model, you can do some serious tweaking without making the model too different. You could add a cape and battle axe, you could give him a santa belly, and elf hat with bells, and jester shoes. And with the animations, the units can all feel reasonably diversified (note that each unit should only use one different walk animation, since multiple animations are done as a per skill basis, which would make walking look very weird if the animation changed every two steps).
Finally, a lot of units are non-humanoid or feature prominent non-humanoid features. The camel archer has his camel, the magician has his hefty get-up class, and the palace is, well, a palace.
