Tom sawyer island is fairly large (although in MK space constraints really shouldnt exist), and is not well utilized. A clear example is Aunt Pollys. If something was over at tom sawyer island that drew guests that restaurant would be open. Its great for kids but is dated (I assume most kids just enjoy running around it, with no idea of the IP), and if people might be surprised what all is there, like the rifles that you can point at people and pretend to shoot (little dated). Now logistically I dont know if much can be done with it, or if they are stuck with what it is. With ADA and its size, and getting people there etc, I dont know. I also dont know if Aunt Pollys real closure is due to logistics as well, staff and food.
Havent been to disneyland, is pirate island the same thing just rethemed to pirates? If thats the case, thats not worth doing, Id rather bulldoze and add something substantial (if possible)