A lot of friends have rebooked and with the extra cruise credit have been able to upgrade their room and/or been able to do a longer sailing.
A few of them have been able to go from a 4 night Dream in a Verandah to a 7 Night Fantasy in an Inside/Oceanview and still have some of the credit left over.
It will really depend on you and your family and what dates you can make work. If I am being honest, I wish there was an option to go out to 24 Months instead of just 15 or whatever it is now but it makes sense.
If your dates are flexible, shop around! See what you can find.