Well... Unintentional bug might become a feature.
Androids from Apocalypse indeed gained stats, but at way slower rate than humans, or hybrids, but they started at overall better stats.
Why not bring this explanation and add few android chasiss/armors for AI's?
Also to keep post from being too offtopic:
X-Com drone have free left hand which allows it to use any piece of equipment. I won't lie, it's fun tactic to deploy a squadron of drones with dynamite, so they can carpet bomb anything below. It's a bit strange, since they don't have any contraption to operate any equipment.