Oops, I left this comment elsewhere instead of here! Guess I'd better go delete that one.
Anyway, my point is that that one meal a day I listed "paid" for the DDP to DXDP upgrade, and everything else that day was "bonus". So I felt that the upgrade was worth the money, because we got more experiences out of it - signature meals, a dinner show, etc.
Ahhh... I see. Of course then, there may be days where you could have gotten that one meal a day, without even having to pay the upgrade fee.
For example, you mentioned that 1 day, you were going to have 2 TS meals, at about $35 apiece.
You couldn't really do that on the basic DDP, but you could have had 1 $35 TS, plus a $15 CS. So mathematically, your $33 upgrade, only netted you about $20 in value.
On another day, I believe you mentioned $36 Garden Gill, plus CS breakfast an a TS lunch somewhere. Under the basic DDP, you still would have been covered for the $36 Garden Grill, plus the CS breakfast. So the value of the upgrade, was just that TS lunch. So you paid $33 for 1 TS lunch that day. (And depending on the lunch, it may have been slightly more than $33, or slightly less).
I'm very roughly added up your demonstration, based on the costs you provided, and some rough estimates. Assuming you had stuck to the exact same restaurants under the basic DDP, and assuming you would have paid for the cheapest meals OOP. (Signatures being cheap on a per credit basis).... It definitely does look like you saved some money on the upgrade. But it's not really clear unless we have all of the information. Still, my very very rough numbers, suggest that by upgrading, you saved about $7 per person, per day. (Not bad at all).
It appears that you are staying 7 nights -- so you have 21 credits per person. It appears that use have committed about 16 to TS meals, 3 to CS meals, and 2 credits not currently used. (Unless my count was slightly off).
The regular DDP would have covered those 3 CS meals (plus 4 more), plus 7 out of your 16 TS credits.
So essentially.... you are paying $33 per night for 7 nights -- $231, for an extra 9 TS credits. Or... You are paying about $26 for each extra TS credit.
Thus, the slight savings of using 3/4ths of your deluxe credits for TS meals.
A couple more TS credit uses, and your savings would become significantly higher. If you used ALL of your credits for TS, then the upgrade would be costing only $16.50 per extra TS credit, but losing the CS credits.