The Ballistic Vest, which spawns frequently on zombie soldiers, is ridiculously OP. With a bash protection of 50 and cut protection of 90, it’s even stronger than power armor, and more than 5 times as powerful as the Dragonskin vest, a close analogue. It might need to be looked at.
Yes, it is being looked at already (https://github.com/CleverRaven/Cataclysm-DDA/issues/36759 and https://github.com/CleverRaven/Cataclysm-DDA/issues/36682).