Stingrays - I can’t get myself to do this excursion. And yet I imagine it’s an interesting activity, as people do this in many ports. Could this be a parent / daughter bonding time that you don’t have to do personally - “tag, you’re it?”
Nassau - I have been to the Atlantis twice (with DCL). I would do it again, despite costs, if my group was interested (my usual cruising family members have all been there, too, but aren’t chomping at the bit to spend that much).
We also did the dolphin interaction / swim at the Blue Lagoon.
Now, we just stay onboard the ship, especially on a shorter cruise (less than 7 nights - but probably even then).