Richard: All good points in a very difficult area. But there was some pin removal going on part way through the change and I think it would be worrisome if it were to become a problem now.
You and I were both there for the carry out. It was not forgettable.
Afterwards I went up on that climb and found all the fixed protection was gone.
I don't have any answers to the question of whether there is a better way of doing things. But that experience defintitely sensitized me to what can happen when someone decides to act generally and unilaterally.
As for pins rusting I would not counsel using cadmium plated pins such as I made. Rain is sufficiently acidic to remove traces of the cadmium and leave it on the rock. There are probably not many of mine left at this late date.