I don't know if this will be true for all dates, and maybe they will release more availability later this morning, but I noticed some interesting details when booking for 12/15 or 12/16. The maximum party sizes for any of these reservations is 10, and only Biergarten and Akershus are available for parties of 8 or 10. Spice Road, Biergarten, Coral Reef, Le Cellier, Akershus, and Garden Grill, have availability for parties of 6 or less.
Only Spice Road, Biergarten, and Akershus, are offering the 7pm show. This is regardless of party size. All restaurants are available for the 5:15p and 8:30p shows.
ETA: Rose & Crown was also available for 7pm show, but with limited availability, 4pm seating only.