This seems to have assumed that the Exo were originally built with individual personalities for some sort of altruistic reason. Given what we know about human nature, and the way we construct mass-produced killing tools, that sounds unlikely. People already have issues walking through the Uncanny Valley when you put a face on an ATM. Putting not only a face, but also the surface perception of true individuality and volition into a machine you're intending to use as cannon fodder would be pretty contrary to our historical attitudes to such things. Not only does it creep out the civilians, it reduces the effectiveness of your commanders; sending cruise missiles in is a no brainer, but what if you have to sit down with them first over coffee and discuss the battle plan? Suddenly they're not disposable, and then what's the point? Another answer might be that the Exo were created to replace specific people. Infiltrators, perhaps. This would provide a justification for going to the expense and trouble of making weapon that could talk back, desert, defect, or refuse to fight. "Exo" is an interesting choice for a moniker, as well. Exo-skeleton? What if the personalities trapped inside appear to be human because originally they [i]were[/i] human? Maybe the Exo was originally just the battlefield embodiment of of a soldier thousands of miles away. We already do that now, but our tools are far more crude. Anyway, it was a fun read. More thought about why humanity would create this specific weapon in this specific way may serve you well.