My wife and I are going on the POA in September. We would gladly take the refund/FCC if there was a way to volunteer. I do want to go on the cruise but I wouldn't mind taking taking it next year instead and taking a different one this year.
We have a POA cruise booked in September and if they needed to free up capacity, we would probably take the deal of full refund and 100% cruise credit. NCL should find a way to ask for volunteers.