Disney used to let you schedule a meal after the first show so you wouldn't have to eat so early. I guess too many people were going to the show then skipping the meal and creating too much paper work.
Personally I think it is a mistake to not allow a later dinner time or the second Fantasmic showing. Afterall, I have to decide if I want my family to eat a lite lunch at the ABC Commissary or the counter sevice by the "Honey I shrunk the kids" play area, or to just not do the package. I just can't see eating a big lunch at one of the other sit down restaurants and then eating a big dinner at 4 - 4:30.
If they would go back to letting you schedule dinner after the first show and charging your credit card wheather you eat or not, I could justify the extra cost of the dinner package and still eat a relaxing sit-down lunch. Having said that, we will not be doing the dinner package next week when we will be there during President's Week but will do the dinner package in June because of the crowds.