The OP knew these would expire on 1/7/2016 two years ago when he put them in the credit pool. if they revert to expire on 12/31/15 its not a big deal its only a week less time to use the points. Perhaps that shortens their life in RCI?
However based on the new rule I think he might get lucky and get an extra 11 plus months to use!
This might be the new way to keep extending points
No, it is not. I have the answer, and it isn't what I had previously surmised. The answer is, AFTER AUG 4th, reservations that are cancelled will have points going back to where they came from. So in the case of a reservation from a credit pool, the points will go back to the credit pool. If the OP waits until after Aug 4th, making this reservation and then cancelling it will do him no good.
PRIOR TO AUGUST 4th, cancelled points will be set as points that expire at the end of the use year they are sitting in, and will NOT be associated to a contract. This is a one-time deal; if you were to make a reservation and then cancel it with these "orphaned" points, they will come back as regular points ASSOCIATED TO THE PREDOMINANT contract. I'm not sure it's clear how the predominant contract in an account is determined, but instead of continuing to map those originally cancelled points as "blank," they will be re-mapped to the predominant contract.
Therefore, you cannot use this to "roll your points forward". That may in fact be part of the purpose, as cancelled points would be put into the latest use year, but now they will go back to the contract they came from. This will eliminate the "roll forward" loophole for accounts with multiple use years in them.
The plus side is, you will have an opportunity to extend points that have a short current shelf life if you're a Platinum VIP with a January use year, because the points that are cancelled points can be pooled as late as end of September and extended 3 years.
So back to the original poster... you should definitely make a reservation for early Jan 2016 and cancel it BEFORE Aug 4th. When those points are converted to regular points, they "should" have a December 31 2016 expiration. If desired, you could then credit pool them on December 31 2015 and extend their life to Dec 31 2018.
If you do all of this AFTER August 4th, you're hosed.