As revealed earlier today, vents and holes are planned to be added to the maps to allow easier progression. I like this idea, but however i think this can easily be a bad thing for gameplay if kids can just keep ducking into vents or box stacking into holes.
So simple solution, Put a keycard or boards on the more important holes and screw up the vents, make it so the squad will have to unscrew the vents using the wrenches around the map...and since they can be unscrewed, they can easily be screwed back up. This will prevent it being a rush to duck into the nearest vent and box stack to solo the map easily.
