Well it is Disney after all.So let me get this straight. The Fantasmic Dinner Package allows you the privilege of not having to line up early so that the people who did line up early will get the priority seating that you didn't get because you didn't line up early?
That makes perfect sense.
I am trying to get some conformation on what the actual policy is. This is just guessing but there has to be some sort of time frame where F! dinner package guests can get in before the general public is let in. Providing you are there before this cutoff you should be fine. However, if you arrive after that time you are taking a chance of not getting in.