Now that you mention it, I don't think I've seen a festival cookbook in a few years. I always got them too. Pam Brandon who has written many official Disney cookbooks, does have a new one coming out in a couple weeks that is typically also available in the parks:
So supposedly the GoofyCore thing ended Monday at Communicore Hall - if we have any boots on the ground, please give us a status update of the area! Does it look like they are doing anything to it? Perhaps replace the food that was there?