We were just there Jan 2-5 and ate at the Boathouse using the DxDP. It takes 2 TS credits per person, but they really let you maximize your plan. Your appetizer could be from the salads, the Launch , or raw bar, including the oysters! It was confusing about how you could mix & match the oyster types and that changes the amount of oysters you can get, but they have a special of 6 Blue Points for 1 appetizer. Since we had extra credits, they permitted us to order for a 4th person (and use 2 more TS credits of course) even though there were only 3 of use eating, so we got 4 appetizers permitting us to get 12 Blue Point oysters, the tuna poke, firecracker shrimp.
For our entree we were able to get the Filet Minion Oscar Style and the Baked Stuffed Lobster for no upcharge on either. We went with 2 of each. They both came with a small side so we didn't need to order any of the side dishes which are OOP.
For dessert, since we ordered meals for 4 people, we were then permitted to get the Smores Baked Alaska as our dessert. I don't know what the upcharge would be if you wanted it and didn't have 4 people using their credits. We were really full so we did not get it, we ordered 3 other desserts, and took the 4th dessert to go. It was our best dining experience of the trip.