Unturned really needs building/door tiers. Currently the only way to increase your bases raidcost is to add 1 more layer of honeycomb and 1 more floor on top (has to be both or they umbrella). And with the recent change to black C4 almost one shotting metal structures, this means like 100+ metal scrap just for 1 more charge, and its really goofy. Now, the only way to increase this without adding honeycomb/floors is to make it out of brick, but grinding brick is purely a casino business, you can’t farm for it consistently like metal and even so, surprise surprise, brick doesnt have roofs and doors. So you will ALWAYS have to compensate and add another floor on top of your metal roof anyways. It still amazes me that the vault door exists in the game, but all it does is equalize the health of the door with the wall/doorway (Why does the brick doorway even exist when the best door in the game has lower health?)
I suggest the black C4 gets nerfed and deals 2000 damage only to wardrobes/lockers (thats why it was buffed for anyways) but deals the same 1000 damage to structures. Or brick needs to be craftable/farmable, and needs to have roofs and doors.
With the current black C4, 1 C4 leaves the metal wall at %10 hp. And 2 C4 deletes the brick wall completely, which is just too easy.