Stems from my Cutthroats and Mercenaries suggestion:
While not being neccesary whatsoever, I think it would be a neat addition to add Looted Dwarven Gear, to represent the occupation of previously Dwarven areas captured by Orcs, or the eventual rust or damage to equipment while they were evicted.
Any pieces of Looted Dwarven Gear (at any durability) could be found in Ruined Dwarven Towers & Mines, replacing the current spawn rate of Dwarven Gear, where regular Dwarven Gear becomes much rarer.
They would also be found rarely in Dead Marshes, Trolll Hoards, any future Goblin or Moria Orc structures and would very rarely be weld by Goblins (once added), Moria Orcs (almost full sets?) Gundabad Orcs and perhaps even more rarely by Gundabad Uruks too. (Thanks NightsOfDarkness!)
The Items would consist of an armor set, a mattock and a sword- which all have utumno level durability.
Looted Dwarven Armor
I am unsure wether it should be craftable in a Rohirric pattern with leather and Dwarven Steel, (giving 15 protection points) on a Gundabad crafting table or wether it would simply be findable (giving 16 protection points)
Looted Dwarven Sword
This sword is simply a cracked, lower durability version of the regular Dwarven Sword. It would deal 7 damage, and would be a very uncommon weapon for any Gundabad Orcs to get their hands on. It would be either craftable on a Gundabad crafting table with 2 ingots of Dwarven Steel or would simply be loot-only
Looted Dwarven Mattock
A weaponized version of the regular Dwarven Mattock, it is significantly worse at digging and cutting down trees than the dwarven version- but deals a solid 7 damage in exchange for a extremely low durability. It would not be craftable whatsoever.