I really liked the event, I'm just afraid that it will be a bit too high-brow for people. These food festivals are not about getting full meals, the experience is about sampling various tastes. I'm not sure just how many people who go to a theme park will understand that though, which is why I'm not sure how much of a success it will end up being despite the great food. Seeing the thousands of unsupervised kids there, I didn't see a single kid go into those booths and I fear this might be the same for most of the GP at the park.
I think one thing the park should do is have a "combo option" for each booth. Sell each food item at the booth together at a slightly discounted price. Let's say item A is $5, Item B is $7, Item C is $3, sell them all at $13 to create the feeling that the guest is getting a more substantial value and a meal.
I would also love it if the park had some of these dishes in full meal servings as well. Sure, you can get multiple orders, but that you're still at booths doing it, and some of the booths don't have seating close by. Maybe the could convert Festhaus Cafe or Bistro 205 to a restaurant (not full service) that features these items in meal portions.