Yeah, losing the metal bladed spears really doesnt sound too fun. I've lost hours of my life looking for my flat laying colorful arrows irl, so I already feel deep connection to the fury of my ancestors.
There could be more separation between proper sturdy spears for keeping enemies at range and more expendable throwing spears. Perhaps at the smithing level, so that the throwing blades get more output per ingot, like arrows. And there is plenty of room for a proper hunting update too, that I wouldn't be surprised to see in the future. That would be fun even after stone age and domestication.