I initiated a 25-point add-on at AKV, but I canceled it. As with you, I really didn't need the points. I was mostly buying it just so I'd own a little piece of a place that I love. But I figured I could buy an add-on in a few years when I might be more able to use the extra points.
This is sort of my thought process. I love AKL but do not reaaly see the need to add on there. I am now thinking that if I want to add on points in the future I am better waiting until there is a resort where the 11 month window may be of great value (Disneyland?).
Honestly I can see me adding on 100 points at some time (allow for 1 bedroom vs studio), but I may never have a need for more.