Nice ideas, but there seems to be more than enough food as is. Certainly, if food were actually scarce enough to force you to do weird things to scavenge (ie: eating insects), that would help add more ‘survival’ feel to the game. As is, it feels like there’s little pressure to explore, since (once you’ve gotten your initial supplies together), hunting the omnipresent squirrels and boiling rainwater is enough to keep you supplied basically forever, with possibly the occasional run to a proper water source once a season or so.
That’s nowhere near enough pressure. Aside from the very earlygame, I almost never find myself in a position where I need to urgently raid a zombie-infested town for supplies. As such, I’d be in favor of some combination of this with a decrease in standard wildlife spawn; that way, you’d need to do more than just hunt in order to keep yourself fed, and weird survivalist scavenging tricks would actually be worthwhile.