Well, me too. That said, I feel like Disney should be taking care of their guests and those existing reservations. I, the guest, shouldn't HAVE to call to get it resolved. Not to compare World and Cruise Line, but I feel like..."We will offer you a refund OR you can call to re-book at one of these three resorts." sounds much better than just cancelling, point blank, period.
It's going to affect their call center, either way. Either people are going to be calling to re-book or choose the resort they want to stay at. Or they are going to be calling, upset that they are being cancelled with no explanation. An even better solution would be, "Hey, your resort is going to be closed, we are moving you to Port Orleans Riverside." Sure, there will still probably be people calling upset or wanting to book somewhere else. But, I think a lot of people will just be thankful and take the re-booking.
I am sure once people call, they will be taken care of. But, they shouldn't have to. Disney should be proactive in offering re-bookings.