With the removing of Wind blades, the non-metal weapon alternative, and with Axes being pretty useless as weapons with the new combat system, this leaves a gap in weapons and fighting. Well, thinking about the setting of this game, the stone axes, metal armor, stone buildings, and other such things, why not make a Stone spear?
It would cost something like a Branch, 2 String and a Stone to make, and be unlocked with hunting.
Like Unarmed does right now (For some reason), Spears would have Pierce Damage. They could also provide a slight range advantage, maybe being able to strike from a tile away, making them useful for keeping a giant, angry bear off of you, or keeping PUMPKIN THE MAGNIFICENT ARMORED BEAST from lopping your head off with an axe, for you newbies.
I can also see it's use in strategies, with say, a row of villagers using block while holding shields, while the ones directly behind them are using spears to attack the opponent. Plus, this would make a viable option for towns wishing to defend themselves against a large armored opponent, they might not be able to take the attacker down alone, but could swarm over them as a group and due to the pierce damage of spears, have a chance to take him down.
The only problem with that is that currently, say PUMPKIN THE MAGNIFICENT ARMORED BEAST comes into lolbnewbieville, and attacks someone. The one that got attacked can fight back sure, but the rest of the villagers have to just sit back and watch as he tears their comrade a new rectum, unless one of them has Rage, which not everyone invests in, when there's swimming, farming, hunting and such to raise, so I also believe that attacking a villager should make you an enemy of said village for a time, letting them attack as a group if you were careless or reckless enough to wander into their village to attack someone.