The whole cornucopia is a bad idea. It drastically imballances the starting situation to the person with the best access to a good chest. There are only two rational courses of action; flee, or go straight in, loot the easiest-to-access-chest, and move out.
If you flee, you will be hunted down by the guy who looted the lucky chest with steel swords.
If yo choose to loot, one of the following will happen:
- Someone will kill you either before you make it there, or while you're opening a chest.
- You open the chest and find food or armor or some other worthless item.
- You open the chest and find a useful weapon, and then may insta-kill everyone nearby with impunity, then take the armor and food for your own?
It makes the rest of the map redundant. It might as well be a random number generator deciding who wins the best sword, and thus, the game.
Well, in Hunger Games fashion, the opening at the Cornucopia is supposed to be a bloodbath. Moreover, I like that tactical decision; you can play it safe and run, or go for a high-risk high-reward chest retrieval.
As for trying to maintain balance in my WIP Survival Games map, inside the Coruncopia is a hidden admin area where there are chests with presorted items for the Cornucopia. At the start of the game, each chest in the Cornucopia is filled with one Major Item and 2 Minor Items. Major Items are a wooden weapon, a piece of chain armor, or another vital tool (a fishing rod, bow, etc). Minor items are food, consumables, and other utility items (torches, coal, arrows, a compass, an ender pearl, a potion, a boat, etc). Nice weapons and armor are something you'll have to find elsewhere, but these are enough to get players started.
There is also a 3rd admin chest which contains Artifacts, one of which is put into a random chest every day in place of a Major Item. These include a complete map of the playing field, a Golden Apple, an enchanted tool (Knockback II Stick, Waterbreathing Helm, etc). I might replace this chest with a Dispenser-Powered Randomizer instead, but I do like the Admin being able to exercise their discretion when picking this.
On subsequent days at dawn, each chest in the Cornucopia is refilled with 1 Minor Item, with one chest containing a single Major Item or Artifact instead. Only 1 person generally gets these, so the rewards are reduced for balance purposes, but they're enough to make it worthwhile to come back and risk a skirmish with other like-minded players.