Hey guys !
Just ignore the last suggestion I made on the same topic, the link doesn't really work and it is flooded with useless answers, so we'll start fresh here as I finally figured out how to properly attach links (see at the bottom).
This link leads to a Google Document I've written about a new design for armors within the game. All is explained in there. A very short summary would be Leather < Padded < Mail < Scale < Plate but the heavier the armor, the more costly it is to craft, and the metal gears even need constant maintenance to keep in a usable shape, so it should be scarce, which will create more of a medieval feeling to a battlefield since only the players who are rich and / or influencial will be able to access the best gears.. also you will have to be strong to use heavy armor effectively, of course.
But you should really read it, it's 7 pages long but it doesn't take that much time to comprehend.
Enjoy the read !