The change from 2016-2017 is a trade of the quick service dessert for an additional daily snack. This means that you will get the following allotments on the basic Disney Dining plan per night of stay in 2017:
2 snack credits per person
1 quick service meal (entrée & non-alcoholic drink) per person
1 table service meal (entrée, non-alcoholic drink, dessert) per person
Walt Disney World bookings for 2017 dates begin tomorrow, June 21st and can be done here.