Ding ding, this is the correct answer. Ford has changed the decel rates in the 2016 to be more "robust". Not enough people out there are able to get that 100% braking score because they start braking too late, so giving them a little more coasting decel means they will start braking at a lower speed and thus recover more energy. Nothing has actually changed technically, its just that now coasting gives you the same decel/regen as a light drag on the brakes did in the 2015 and earlier. It's all phsycological, if you were getting 100% brake scores in the 2013 you'd be getting the exact same amount of regen as a 100% score in the 2016.
Thanks for this insider info.