Well the dinner is the same as before from what I can see, except it's been pared somewhat. And it used to be one credit.
So in effect for the 2 credits instead of one per person you're getting
1. a special,
unframed, unmatted lithograph (worth $50), no matter how many in the party.
2. A package with four 4x6 prints and one 6x8 print of your photo,
as well as one 6x8 print of Cinderella Castle,
in a Cinderella photo holder (valued at $29.95 plus tax)
One package for up to 4 guests, two for 5-8, etc.
For a family of four, you're essentially getting what disney says is worth 80 bux and it's costing 4 credits over what it's used to. Is it worth it to you? That's essentially the question you need to answer.