I'm having the same dilemma as you right now. A friend of mine did DxDP two years in a row with her husband (I'm going with my boyfriend) and she highly recommended it. She said she'd never go without it. They did do a lot of signature restaurants and I think they did 2-3 TS meals a day.
I have read that if you don't do a lot of signature restaurants and at least 2 TS meals a day, you do not get your money's worth. I am past my 180 days and currently don't have 2 TS meals EVERY day so I thought maybe it would save us some money if we downgraded as well. But if we did downgrade, then we'd have to pay OOP for some TS meals and if we were paying OOP, we probably wouldn't be ordering steak and seafood and also appetizers and desserts.
It's a tough call for me because I also love the idea of having everything paid for and I know the DxDP is more than enough credits with all the options in the world. There's no worrying about anything. But at the same time, we would save some money. I guess the best thing to do is figure out how many meals you'd have to end up paying OOP for if you downgraded, and using the menus online to add up that OOP cost based on what you'd probably order. If it comes out to be what you're saving by downgrading, then it's not worth it to downgrade. I'm struggling with weather or not I want to be concerned about getting our "money's worth" if we stick with DxDP. I'm not sure how much I care about that because I like the convenience and options of it.
Good luck deciding!