This property doesn't upgrade based on status. If they are at high occupancy they will upgrade to accommodate that, but that's it. You'll get the room you paid for in 98% of cases, and Diamonds on cash rates will be higher up the list than those on redemptions.

That said, if you're on a cash rate (or even on a redemption I guess) with plenty of things booked (Terra, spa, diving, excursions, etc.) then on a longer stay it's worth asking your conceirge if any other room types are available for later in your stay as you'd like to experience them. I know a couple of people who have done this on paid stays and the resort has sorted it out for them for their last 3 or 4 nights.