I don't know when, but the soldiers behaviors has been fixed - they will now correctly attack rioting prisoners and prisoners will surrender to them when under fire.

• Soldiers have been added (replaces land-based elite ops & a new air-based soldiers callout has been added)
• Fixed soldiers not shouting when issued move orders
• Added helicopter sound effects to visitor helis (does not affect anything if you don't own Island Bound)

• Replaced soldiers with elite ops (Island Bound DLC is not required); still costs $1000 and you will receive 6 via truck
• Gave the elite ops units soldier sound effects

After doing some digging and several hours of trial and error, it's become apparent that the soldiers are completely broken and not fixable via modding at this time. If they get fixed, I might come back and add a separate soldier callout or replace the elite ops with the soldiers, but for now, since the elite ops have pretty similar usage and behavior, I've swapped them in.

Initial upload