the problem still remains in those 6 food you deliver from the farmers chest, if not eaten they will rot in the personal storage of the house it was delivered to and take up inventory slots and require more management.
This is why I say compost should be a thing, because right now this rotten food things is simply a giant waste of time and a huge inventory management problem. it needs to be a mechanic that is expanded upon and right now there isn’t really a solution.
probably the best way is to add an expiration date to all the foods in the game with tooltips and a way to delay rot - rimworld does this exact thing very well. ( and I think space engineers does something similar with oxygen dispersing throughout an enclosed structure and the same could be done in Hearthstone for the temperature / airflow mechanic Rimworld has)
https://www.youtube.com/watch?v=chnK-FAh2aA&feature=youtu.be&t=14m55s
it doesn’t need to require refrigeration technology tho or even temperature, like I have said before simply organizing foods based on age you picked them and placing them into storage like crates or pots etc should delay the rot because rotten food next to fresh food spreads rot like a slow fire
there are no positives for over producing food besides keeping a log of how much your town eats and selling the excess before it rots