Ground will never work until after publish. (Unless we manage to somehow massively change the way things currently work.)
Space should work in preview and publish, though. I've found that the real problem is that when ships are at idle, they move, but very slowly and mostly in-place. This makes it seem like your wander stuff isn't working. Set idle weight to 1 and wander weight to something really high and see what happens. And set idle duration low and wander duration high.
Play with it and see if you can make stuff work.
I did as you suggest, the Borg Spheres move around but not much more than their own radius.