For us, the first question would be - Can we afford more points and to continue our pattern of trips as is? Only if the answer to that is yes, would we consider adding on more points.
Maybe it's time to skip a year (or downsize the unit or shorten the usual length of stay) and "catch up". I foresee that sad day coming for us. One of these years it's going to be a studio. Talk about spolied, right??