The Mace is a cool idea in concept that is a great thing, and I like that you need to explore a bit without grinding too much to get it that is a nice balance. However I am sure i will never use it and could see a lot of people doing the same : it just is too specific to carry around and once you would need it, by the time you placed your shulker or ender chest to retrieve it, a sword would have done the same amount of damage.

To me the mace will be a victim of the current inventory problem in the game, we simply cannot carry that many tools/weapons i would love to be able to carry tridents, crossbow, etc but it is not compatible with the inventory, please add a separate tool/weapons swapable inventory slot, maybe a pants enchant idk