bit too extreme, extended cooldown better. plus these are weapons, they are made for fighting, should not be weakened by dmg prot by significant amount (except for weapons like katana bc they have low durability and subpar steel).
repairs being expensive only enables spammers and put people like us at a disadvantage
plus if such thing is applied to melee, bows must need repairing too, and buying arrows.
maybe only sickle breaks