Chainmail Under Armor

A feature I really think should be added to chainmail armor in Minecraft is the ability to either combine chainmail with any other armor piece or have a new armor slot in the inventory specifically for chainmail. It should add some armor toughness, not sure how much. But it should also have some sort of small penalty to balance things out a bit. I'm thinking slowness. But not as much as slowness I. It should also be visible under armor pieces. For example, in a full set, it should be visible under the helmet and chest-plate at the neck and the sleeves slightly. And when each armor piece is individually worn, chainmail should be visible for each. Sort of like how the Snout armor trim leggings have the belt when the chest-plate is taken off. To me, this feature would still feel vanilla. I'm not sure about how other people would think, but I don't think it'll impact survival gameplay as much, since people can just choose not to add chainmail if they don't want to. But I can see it having some effect on survival multiplayer servers, giving players with chainmail advantages and slight disadvantages.