OP's original question asked what will happen if the award flight one already has booked is cancelled because of these fleet reductions.
What is the carrier's obligation to reaccommodate award travelers when the flight you booked is dropped? Are our awards at risk even after we book them?
For instance, say you have an award flight booked out of a small mid-continent airport so that you can connect to that international C/F flight on a partner airline. Then sometime later, all service to/from that airport is dropped.
In that situation, I would expect the airline to simply cancel your entire itinerary and refund your miles - little consolation if you *really* wanted to take the trip - or put the onus on you to get yourself to another departure airport. I hope I'm wrong, but...