Congratulations! Don't worry, in general the minimums were only restructured, and most of the really high ones are only if you want to have a full meal, rather than desserts.
The 20-person minimum locations now have a flat $440 food and beverage minimum instead of $22/person one, but it works out the same if you have 20 people. Since you have 12, you'd be paying more per head, but you could also look into some of the new smaller sites like Africa and Canada, which have the same old $22/person minimum.