Unless something has changed since I last asked this question last fall, the DxDDP is pretty much wasted here. The sushi menu doesn't count as appetizers; you have to order off the appetizer menu. And only the combo sushi platters can be ordered as your entree, not individual rolls.
Based on the advice of experienced DISers we've been putting off going to Tokyo Dining until a trip when we're not on a dining plan, because I just can't see the sense in it if I have to pay OOP for the items I've been drooling over (specifically the dynamite roll - the photo on the DIS menus site has been taunting me!). In the meantime, I'll get my sushi fix at California Grill and Kona.