I really doubt that the concept of "fairness" enters into DVC's calculations at all. DVC is a for-profit business, not a charity or social-service agency.
DVC obviously has a booming market for
onsite WDW DVC properties. WDW is by far the biggest draw in the Disney constellation and DVC has proven to be a natural and VERY profitable fit. Whether it is sufficiently profitable at
Disneyland, or in Hawaii, remains to be seen.
To me, the less "Disney" a venue is, the less attractive DVC becomes relative to their competitors. There is a real marketable advantage to being onsite at WDW. I think there is much less advantage to being onsite at DL CA, and I'm not sure what the rationale is for Hawaii. If I were considering a Hawaiian or Caribbean vacation, there would have to be some distinctive "Disney" advantage to make me choose DVC over a competitor. Both of those markets have literally hundreds of world-class resorts, and competing there is nothing like competing at WDW.
One concern I have is whether DVC has enough management horsepower to manage what they have now. They obviously put the lion's share of their effort into marketing and expanding. We can only hope that emphasis does not lead to a decline in the guest experience at
existing resorts. That would be the greatest "unfairness" of all.