I tried going down the Archon path for my current game and have cast mind break on some slaves. I've noticed that while the thrall trait states that they should be incapable of skilled labor, they still seem to be able to (they still have access to all types of work they had before becoming a thrall), and they don't get any experience doing any work any more. I also find it kinda strange that the thralled slaves still revolt and try to from time to time.

What's the intended effect mind break and of the Thrall trait? I think the current descriptions in game leaves a lot unclear.