<<I am surprised that there is not more information, regarding the state of R/W 27L, other than ".....not available for landing". Is not the presence of the wreck and salvage cranes and activity, important information? I am thinking, for example, about the possibility of some sort of emergency which might cause a pilot to consider 27L as an emergency option for landing.>>
I think the ATIS provided all the information which was necessary. No aircraft were being directed to 27L so there was no need to inform inbound pilots about what was happening. At times when the runway is fully serviceable it may still be "not available for landing" for a variety of reasons but the details are not necessarily broadcast.
In the event of an emergency a pilot doesn't simply head for a different runway. The airport authority may have a say in what the preferred runway would be for a real emergency and this would be put to the pilot some way out. If the emergency occurred so close that this information could not be conveyed it would be far too late to switch runways anyway. The decision where to land is the captain's, but he is unlikely to make the sort of radical change to plans which you infer.
The other problem is if, for some extraordinary reason, a pilot landing on 27R suddenly decided it would be better to switch over to 27L he would probably be confronted with a runway on which several aircraft might be lined up for take-off.
Hope all this helps.