Aaaand, I got inspired to add in some new armor over lunch. So we now have chain vests, chain hauberks (long chain coats), Lamellar armor, Heavy Lamellar (basically long coats of lamellar), scale armor (identical to chain, but there for flavor), scale hauburks, and chain mail coifs.
I can't do that much with the new armor system, sadly, but I think the new variety will be nice. Chain vests should only take 1 bar of metal, so it's a cheap light way to armor a soldier a bit. Hauberks take 3 bars but provide very good protection. The chain coif offers a little better protection than a cap, though it's flexible so I think it won't work as well against bludgeoning. It can also be worn under a helm, and the combination is very protective.
All of this needs more testing, but it worked about right in the Arena.