No thanks
The problem with food spoilage is that you need to really enhance the actual food system to work around it. We now have crops that grow from seed to maturity in 2 days (alien virus is great!) ... and most food consumed is still done so within probably a few days, or maybe a week.
Implementing food spoilage means you need to properly implement food preservation. Ie, a freezer (or just storing it in a snow biome) should keep food indefinitely (30-500 days is indefinite in 7dtd

and then you have to start implementing food preparation too (ie, re-heating, re-cooking, thawing).
In the end:
Early game - No difference. You generally eat all food within days, or find cans which last for months.
Mid game - No difference. Store it in a snowbiome (or grab ice for an ice box in an underground cave).
Late game - No difference. Store in a freezer and take out when you need it.
I think instead of spending time on this, spend it on things people all benefit from (bandits, npc's, more content, underground caving, water/rafts/boats) and so on