Compared to the other constructs that the arche had made, their blasphemous 'archeshell mech' demonstrated a level of durability that exceeded the limits of conventional transphasic alloys!
Even if archetech ingeniously made machines a lot denser without severely impacting their functionality, there were limits to how much creative engineering could make them tougher.
What soldiers took from this monstrous archetech creation was an alien 'mech' that could compete against the best of standard mechs in terms of damage resistance alone.
However, what mech designers such as Ves and Gloriana took from this unprecedented work was an accidental product that coincidentally combined multiple design solutions that were normally incompatible with each other!
The fact that archetech somehow managed to get along with phase lord body cultivation and not immediately fall apart was a miracle in their eyes!
The research value of this anomalous alien work suddenly shot into the roof!
