Sabrask's wall doesn't seem to make sense in objective modes. You can't challenge them directly, only one class has a grenade to get around it, and portals aren't always available and also easily countered since they can just turn to close them without risking taking any damage. In modes like firecracker or hot zone where time is important, its resulting in a lot of checkmate scenarios where you can't stop them, especially if there's more than one. One thought is the make the wall block bullets from both teams, that way it acts as a more defense oriented ability. You can still challenge but it has to be up close - this would help make shotguns more viable too.