We were not planning on doing the all inclusive, am i right that it is optional?
Like I said, unless you are staying at the Divi Links, Divi Village or Divi Dutch Village, it is not optional. It is included in the price at the Divi Aruba All Inclusive Resort. I would see http://www.diviaruba.com/index.php for more info.
A friend who stays at the Divi Village sometimes takes the All Inclusive option for just a few days of her stay. She was told in January that the policy will be changing and she would soon be forced to take it for either the entire stay or not at all. I do not know when the new policy will be in place.