spears are still op after the las nerf, they could be done very easy even with too muc restriction in the serch of materials (with the sharp stone), but the balance could be easy, just reduce the critical chance by 6 or 8 times of the crafted spear, not the composed spears (like knife) to make them more relevant, and make they from leather strips.
i tryed the mod sandox+ mod with the multihits option and should be reenable, stabing with the models dont works, but blunt objects become incredible, thery get into better tan spear, but you get tired faster...
this 2 things could compensate alll the weapon balance very well.
The nail pistol mod its other very interesting feature to add, quiet but not powerfull.