They should include potions, but not too many. Some of them should definitely be added, such as strength, health, regeneration and fire resistance. Horse eggs will be awesome. Iron and diamond swords should also be put in there, not too sure about diamond armour, however. There should be cooked food and god apples only, and stacks of 10 arrows instead of 5. Did I mention enchanted items? Maybe this is a little overboard, but if there are only two in a map, at least some of these should be implemented.