My random thoughts and suggestions

I may add more later, but I am going to bed.

General fixes
From what I see, players should not be able to build in radiated zones, to prevent hoarding supplies and locking others out.
Barricades should not be able to be placed on other barricades.

Building
Stone walls(more durable the wood walls, making wood walls and foundations breakable will help against spam housing.)
Iron doors(Far harder to break)(added)
Ladder
Reinforced Chest(locked chest)
Barrel(stores liquids like water or gas)
Bed(Gives Resting buff which heals slowly and counts for respawn)
Large Crate
Grave Stone(For fun)

Weapons
M14 DMR
FN P90c
FN Five-Seven
M67 Grenade
Underbarrel M203 Grenade Launcher
M32 6 Cylinder 40mm Grenade Launcher(Why not, heh)
M1911
M107
Landmine
Claymore
Bow
Molotov Cocktail
Pipe Bomb
Dragunov SVD(Favored Weapon…)
Throwing Stone
Throwing Knife
Throwing Axe
Throwing Hammer

Sledgehammer(Gathers stone faster)
Makeshift Spear
Makeshift Maul
Crowbar
Knife(Gathers meat faster)
Sword
Club(new starter weapon)
Metal Pipe
Hammer(Gathers stone faster)
Hatchet(Gathers wood faster)
Axe(Gathers wood faster)

Ammunition
7.62mm
7.62mmR
12guage slugs
5.7mm
.45 Cal
.50cal BMG
M203 Frag
Broad Head Arrow

Crafting Materials
Clay
Bricks(cooked clay)
Metal Plating
Stone
Rope
Planks(for fun)(added)
Matches(makes the original fireplace 7 wood for kindling and makes it 4 with 1 match)

Medical Supplies
Mild Painkillers
Strong Painkillers
Morphine
Antibiotic
Surgical Kit
Medkit(Make them last for a number of heals like 5 heals at 10 over 5 seconds)

Misc
Torch
Glowstick

I’m going to number each suggestion.

  1. No, they’ve already said they won’t be restricting gameplay.
  2. I’m not sure about that.
  3. Yeah, they’ll be adding different material buildings later.
  4. See 3.
  5. Yes. Definitely.
  6. No. Maybe a locked chest that requires a key, but even then I’m not too sure about that.
  7. Would be useful for future things (vehicles, getting water, turrets, etc.)
  8. Yes.
  9. Eh, not sure about that, would be cool, though.
  10. I’m not going to comment on all the weapons, but they all sound pretty good as long as they’re balanced.
  11. Same thing for ammo.
  12. Same thing for resources, sounds awesome.
  13. What exactly would morphine do? Reduce pain? If so, add a suggestion for a “Pain” feature.
  14. I like the Misc ideas.

Basically all of the items you suggested have already been suggesting and are probably going to be added in the future.

I am guessing some have been thought of a few of these at least and I do suggest a pain and hydration system. The weapons are all pretty common in the world, some being very deadly, but can be offset by huge cost. The building in radiated areas idea can actually be bypassed with the ability to break things like walls, sledge hammers would be the best for things like that.