@Legio,

About armour quality, I think we already have the Blacksmiths upgrades. So, I presume that (the chain mail you have talken about) differences of quality are already dealt with.

By the way, I think Blacksmiths should also translate the armour/weapon material evolution (cooper-brass-iron-steel) as well as the manufacturing thecnics such as temper, pin rings on the chain mail and a lot of other processes I have no idea on how to say them in english !