And you STILL came out ahead? I'll admit that I have no experience with the Deluxe plan but that's very surprising.
I "beat" the regular dining plan on a ten day trip a few years ago and I became an anti-DDP evangelist immediately thereafter. Just way too much food. The pressure I felt to make every credit count, combined with the intricate management of who's eaten how many snacks and all that was more than any value I derived from lack of sticker shock. My way of avoiding sticker shock is to just way over budget. I'll usually plan $100 per person per day of food even though we never come close to that. We charge everything to the room anyways and pay the balance with gift cards every few nights.
I did a day by day breakdown last trip in my trip report (2013). And, no, we didn't come out ahead. It was about break even (I think we were $50 shy, something like that). In 2011 we came out ahead (there was a group of 4 and we did several signature dines). 2012 was break even, iirc. 2010 I didn't pay attention.
But, each trip is different.
For example, the upcoming one...I'm planning 4 days before a cruise. It breaks down something like this.
Total Cost w/ package - $438
Meal Credits - 18
Day 1
Jikos Credits - 18 - 4 = 14
Cost - $438 - $170 = $268
Day 2
Cindy's Breakfast Credits - 14 - 4 = 10
Cost - $268 - $118 = $150
QS for lunch Credits - 10 - 2 = 8
Cost - $150 - $40 = $110
Be Our Guest Dinner Credits 8 - 2 = 6 (if I can get it)
Cost - $110 - $100 = $10
See, halfway through the trip of dining would pay for the plan, plus some...
It was more affordable before my kid turned 10. A much better deal. $110 + $30, it was pretty easy to eat $140 worth of food and snacks throughout the day, if you did TS and Signatures littered in there. But, now she's an "adult".
We'll have a LOT of food, but it will pay for itself. And, as I said, there are two things that bring added benefits to me (personally). And, it is a subjective value assessment. I would probably avoid a lot of the TS options were I paying out of pocket, and I certainly wouldn't order appetizers and desserts on a regular basis.
Like a Cruise, it gives me the "feel" that I have "free food" during the stay, and as a result, it's not a concern. And, to me, there is value in that. I probably would spend a lot less (either on DP or OOP) as well.
That said, I do totally understand why many prefer to pay OOP. It's just not something I care to do.