Thought I'd make a few suggestions/what I'd like to see in the future. Some I know have been said already, but it doesn't hurt to let you know more people want it.
-safe houses, and hopefully upgrades and fortifications that can be made like reinforced walls, boarded up or barred windows, barbed wire, alarms, traps, gun slots for shooting out of, maybe some kind of gunner or sniper post on the roof. Also it would be cool if you could manage your survivors there, like have some stay at the house to guard it or gather food and water while yourself and the rest of your survivors go out to scavenge
-stackable inventory, and I like the idea of having containers to organize of add extra inventory space, like the backpacks and duffle bags
-vehicles, also maybe with upgrades
-upgradable weapons, armor, and tools. I've noticed they already have levels, though I've never found anything yet over level 1, so maybe this already exists or is in the works. But I like the idea of weapons and armor leveling up as you use them and become more skilled with them.
-more detailed information on the reverse side of items. For weapons, I'd like to see damage, ammo type, clip size/max number of shots fired per turn. For armor, only thing I can think of is amount of armor given and the position the armor is worn.
-armor specific to armor slots. Right now you can equip any piece of armor in any slot, but it doesn't give you the armor bonus unless its in the right place.
-crafting. I'd like to see explosives (Molotov cocktails seem easy enough to make) and first aid kits be craftable with scavenged items. Also maybe making improvements to weapons, like adding a knife/bayonet to the barrel of a gun with some duct tape, wrapping barbed wire around a melee weapon like a baseball bat, or reinforcing armor with metal plates or just thicker materials.
-chain saws, swords, explosives
This is what I have so far. Keep up the great work, I love everything so far and appreciate the fact that it looks like the dev team really cares and listens to player feedback, which is why I'm posting here in the first place.