For what it is worth...
I had our family booked for 8 nights at POP under the kids play/ eat free. Park hoppers (no water park) and upgraded from QS to regular dining. We are 2 adults, 2 kids, and switching to FD today saved us only $75.
Also, for us to upgrade to a Moderate would only cost us just over $400 for the trip- $50 per night. I think I will stick with POP, but not sure since the price is so close.