Sometimes when I replace a piece of my armor, I mess up applying it to my weapon. Often I just realise it when somebody else tells me I’m naked.
It would be nice if the kind of armor would be more distinguishable in your inventory. For example put a colored mark in a corner - white for cloth, brown for leather and silver for plate.
Also it would also be nice to see on first sight if a part of your armor didn’t fit to your weapon. For example if you are using a sword and a cloth chest, the chestpiece might have a red background in your inventory.