They can also change them from one unit type to another. While the 2010 & 2011 changes were technically 2, they really were one continuous change stretched over 2 years due to the limitations in place. There really isn't a lot else they could do from a points standpoint unless they go back the other way at some point. The one issue might be for the smaller components of the lockoff's which aren't bound by some of the rules in the POS as I understand it and possibly for specialty booking categories. I wouldn't worry about it too much but if one is looking at mostly smaller units, less than a full week or lower seasons, I'd consider a cushion in the # of points purchased. For example, someone looking at a studio, adventure season, in the cheapest room (value AKV/standard BWV), and less than a week should likely consider a MAJOR cushion, maybe as high as 50% or more.