There is no human death animation. It goes from alive to dead position instantly. Also, it seems there is only one dead position, namely, facing the ground. In Trem human death, the dead human faces either the sky or the ground depending on how he was killed.
The human builder holds the ckit as if it was a weapon, which I find to be a bit odd and awkward. I think it would look more natural if it was held at waist level like the Trem humans do. I don't know if it's possible but having different weapon pose would look better depending on the weapon being held. For example, the chain gun, flamer and the lucifer cannon would be held at waist level, due to them being heavy and bulky or by the nature of the weapon.
The human sprint animation was rather awkward having the weapon at the ready position all the time.