Just my .02 cents but while I like complexity & difficulty, for them to be enjoyable, to me, they need to make sense.
So I'd be all for food being a lot tougher, but only if things like chicken coops, rat farms, fishing & 1 deer kill equaling a couple weeks of meat were in.
Have amount of canned food found in loot reduce x% per day so that by day 21 it's be really rare to find any.
Farms would be required for long term survival, could be somewhat offset by trader.
But all of that is a -lot- of work for what it would possibly add.
So the current, & likely future, 'food mechanic' 7dtd has, while not terribly immersive, at least isn't a constant pita; which I'd muy pronto mod out.
Edit: that came out a bit harsh. I think the current setup is enough so that it can be balanced to make food a challenge for the early part of the game, which is good, and also 'get out of it's own way' later on so we're not constantly having to micro mange it. Having to balance for both SP & MP, in this, means default vanilla will likely always see SP food being too easy for lots of veterns. Perfect for a mod to address if the Gold ver doesn't wind up with seperate SP/MP configs.