Agreed - 5E was designed to simplfy many aspects of older D&D mechanics, and that is something I accept. I really (really) don't want more home brew in a game that already deviates significantly from 5E. Armour is simply an abstraction, and they have abstracted that further in 5E, just as they simplified many systems. Changing amour would I think be a major change and may have unexpected side effects. We have already seen how messing with the action economy has affected things, for the worse in my view. Besides, a change that implements a non 5E system would be a further slap in the face to those who simply want the promised 5E game.
