You might be aware of these, you might not. but i have seen some people exploiting maps recently. for instance putting a Turret, egg, acid tube in a spot in wich the hitbox is hidden from anything but grenades and lucifer cannon fire. Somtimes even that does not damage the said building.
i was wondering if you devs were aware of this and are going to implement a fix to the maps in the next patch to prevent people from building objects inside map objects.