Well DA is the only total war user which doesn't kill everyone. Though it is hard to describe how exactly the locals live it through.
"Identity does not survive." According to this they remove whatever knowledge, and identity the person had and replace with the usual drone program.
When you conquer a DA the cyborgs survive the process however. Either their organic mind manage to rebuild them as individuals, or something remained from it.
As drones they got no happines, join no factions, and eat no food. According to this they are more like zombies, than actual living beings. However if they still have their original mind working on some level, then they should live this like slavery, but. That is not the case. If you conquer a DA, then cyborgs gain the "recently conquered" modifier instead of the freed from slavery.