Since so many recipes are no longer available in game, and these coupons are fairly useless why not change the drop list they are attached to so they drop a random recipe under level 60. That would be a lot more fun, and would not unbalance the game. Drop recipes from all craft skills, including alchemy and cooking, that way more people could get rare recipes and prices will drop.
Plus, we may find some cool skins in some of the many lower level armor and weapons.