It sucks to lose the resource, but in reality there are better sources for time/frequency agility these days. For propagation, WWV/WWVH which offers more frequencies. I wonder if the current transmitters were due for an overhaul and they couldn't justify the expense.
The location where the transmitters are was "in the middle of nowhere" when it was built, but far from that now. I wouldn't be surprised if there was pressure on the NRC to sell for development in the area.