consider this:
The parks sell bottled water at 3 bucks a pop. This makes me cringe, but you really need to keep hydrated when you do the parks especially in warmer weather.
If you load up only on bottled water say 3 bottles each for 3 people that's 27 dollars a day saved.
Then consider the breakfast. If you went out for just juice, toast and coffee for 2 you know it's at least 8-10 bucks. Here you have that, plus fruit, cereal, muffins, etc. Served hot and fresh in the comfort of the club lounge, instead of getting your car, driving up and down I-drive, getting lost at least once, and no refills if you get it to go.
And we have not even covered the afternoon snack and the bedtime snack.
Since I am local I usually stay offsite in a suite and provide my own breakfast, snacks, and beverages. When you are talking about myself and 2 kids it still gets expensive. Not 50 bucks but close. I think the biggest savings is actually the water- I get 28 bottles of zephyr hills for 7 bucks at costco. At the park that would cost me 84 bucks.
So if you ask me, if you aren't hauling groceries along to save a few bucks, 50 dollars a day for breakfast, beverages, afternoon and evening snacks for 2 or more people is definately worth it, besides even without those perks if you are staying at the Entertainment rate you are still at a 1st class hotel, paying far less than lodging alone at Disney.