Sweeteners: I also made these cookies with a granulated maple sugar and they came out nice and crispy, but you could also just barely pick up the texture of the gelatin granules in the cookies. If you are on a restricted diet where you cannot have eggs and can only use a granulated sweetener (coconut sugar, lakanto, etc) it will work, but you will get a more crisp and crumbly cookie.
Coconut Flour: For this recipe to work properly you need to use a very dry, fibrous, and absorbent coconut flour. It will not work with some of the new coconut flours on the market that are simply ground up dried coconut. I link above to the brands of coconut flour that work the best in this recipe.