1) BoG is an experiment by WDW to see if they can start reducing the quantity of Special Requests (other than allergies) and substitutions.
2) Eateries at WDW are getting overwhelmed with Special Requests by guests with picky appetites and/or tastes.
3) This increases manpower costs and kitchen prep time - it clogs the system.
4) With fewer allowed modifications, the food comes out quicker and with less manpower in the kitchen staff.
5) If you have noticed, the allowed substitutions, especially of side dishes, are also very limited.
6) So, far things are working pretty well, according to chef-cooks whom I know that work there.
7) Look for these type of changes to be made at other WDW eateries.
NOTE: We have major interest in two eateries a) breakfast and lunch Blue-Plate-Special type of diner and b) a fine-dining dinner-only eatery. IN both locations, we have allowed the chefs to significantly limit the number of special requests and substitutions. Costs are down, profit is up, and food delivery times have been reduced.