EDITED:
Thanks to the new XBOX BO video that dropped today we have the pro version of hardened now, sleight of hand ( already known ) and Hacker now has been added that you are invisible to motion sensors which makes it more use full now.
Hacker Pro -tier 3
Can sabotage enemy equipment, turrets, and crates. Invisible to Motion Sensors.
Hardened Pro -tier 2
Bullets do extra damage to aircraft and turrets. Reduced flinch when you are shot.
Sleight of Hand Pro -tier 2
Faster aiming down sights with non-scoped weapons.
Thanks to the new XBOX BO video that dropped today we have the pro version of hardened now, sleight of hand ( already known ) and Hacker now has been added that you are invisible to motion sensors which makes it more use full now.
Hacker Pro -tier 3
Can sabotage enemy equipment, turrets, and crates. Invisible to Motion Sensors.
Hardened Pro -tier 2
Bullets do extra damage to aircraft and turrets. Reduced flinch when you are shot.
Sleight of Hand Pro -tier 2
Faster aiming down sights with non-scoped weapons.