Unfortunately, it's not worth it, unless you want to eat dinner very early, when the package is offered. You will be told to line-up an hour before showtime, because they have eliminated the separate entrance for package diners that they used to use. You are not guaranteed a seat. They give them away oi the general public, some time before the show starts. So, if you're not lined-up early, you don't get a seat.
If you want to east dinner really early, then go for it. I'm not sure what they are doing right now, but at one time the package included an appetizer on the basic dining plan.