If I recall correctly, there was a special menu for the Fantasmic package, and even with the dining plan, it was something like 1 appetizer for 4 people, and they were flatbreads to share.
To be perfectly honest, I ate at MM in high school and hated it, but figured after a few years it'd have gotten better. It was still bleh to eat and honestly, not worth the waste of the TS credits, not even for fantasmic. And the seats weren't all that fantastic either.
The fantasmic package pretty much only guarantees you a seat, and it's not worth suffering through the meal and waste of TS to get it.