A buff system, camping mechanics or a survival mode, there are plenty of options if you add cooking mechanics. And as stated before, there is a cooking proficiency and cooking tools already in D&D5e. I didn´t see any tools used in the gameplay, tho (Mason´s tools would have come in handy when Lae´zel demolished the stone wall).
I hope we could have a complete crafting system when the game is released.
