The Seanchan Empire in the vision was not one of stability - it was one of extreme control. To the degree that the Dark One is an "uber-control freak", the society fashioned by the Seanchan carries the risk of becoming just like the world under the DO's rule (non-existence aside).

The stability and justice the common folk experience in their lands is a good thing, but slavery coupled with the backstabbing and distrust in their upper ranks does not bode well for them being a good government in the future.