Originally Posted by
shefgab
Can you get a refund if the miles needed for an existing booking has decreased?
From the FAQ
Can I cancel my existing reward flight and rebook using Reward Flight Saver?
Yes. You can cancel an existing reward flight and book a Reward Flight Saver. But you will only be able to book Reward Flight Saver tickets when they go live in November. And once a reward flight is cancelled, there is no guarantee there will be space available on the same flight.
which suggests that no, there will not be automatic refunds...