Make an upper Barrier
- A lot of people have been using stuff sticking out of buildings to get to places where they should not be able to go. If you find the highest point on each map you want a unit to be able to get and then create a horizontal invisible barrier just above that it will stop a lot of that nonsense.
Reentry Portal
- On the co-op maps the Ai bosses will push you out of the map on spawn sometimes. You can walk around outside of the map but cannot get back in, if you placed a reentry portal pad outside of each map to allow players to be spawned back into the map though one of the portals the AI uses this would be very helpful.