Okay, so I've collected some concepts for future armors, though they are also not perfect and just show what direction I think we can go with each piece. I've also separated armor into three categories, as I've originally planned - Light, Composite and Plate.
Original game had 12 armor sets, 10 of which were plate. In my plan, there are approximately 16 sets, but we can skip some in the process to return to them later. Main idea is to give each category something useful while trying to keep original armors intact.
I understand that this will take a few years possibly and we still need more people, but at least we are thinking about it now. Finally, I've also added some gameplay ideas for each armor, though it should be optional, of course, and even if these ideas will be realized, every plan might change ten times from now. So, here are the armors:
Padded Armor - armor made of simple cloth. Cheap and very common, but protects reasonably well against slashing and bludgeoning.
Fur Armor - thick clothing for harsh cold. Rather cheap and common, offers some protection from slashing, bludgeoning and cold.
Leather Armor - slightly more expensive leather gear. Offers additional protection from piercing damage, though not by much.
Mithril Armor - thin as cloth, but strong as steel. Expensive and rare armor, offers good protection from piercing and slashing damage, but doesn't reduce bludgeoning damage by much.
Elven Armor - rather thick and made of metal, but still surprisingly light. This armor offers really good protection from slashing, piercing and bludgeoning damage, but makes wearer more susceptible to magic attacks.
Chainmail Armor - common armor, especially popular among High Rock infantry. It's cheaper and lighter than plate armor, protects reasonably well against slashing and bludgeoning, but can be easily pierced.
Lamellar Armor - favorite armor of Redguard warriors. Still rather cheap, offers good protection from slashing and bludgeoning, slightly better against piercing damage, but has lesser durability.
Reinforced Armor - brigandine type armor, essentially metal plates covered by leather. Better protection from slashing, bludgeoning and piercing, but reduces mobility slightly more.
Orcish Armor - well crafted lamellar armor of orichalcum. Orcs are talented smiths, but orichalcum is a rare metal and these armors are very expensive. They provide very good protection from slashing and even piercing, though it is slightly weaker to bludgeoning damage.
Adamantium Armor - very sturdy and relatively light armor. This armor balances between Plate and Composite, but due to its light weight it still belongs to the latter. Very good protection from slashing, but has slight weakness to both piercing and bludgeoning, though not as much as other composite armors do. High durability.
Iron Armor - cheapest among Plate armors, but still somewhat expensive and very heavy. It offers good protection from slashing and piercing, but reduces mobility, reduces stamina regeneration and is still susceptible to bludgeoning strikes.
Steel Armor - standard Plate armor, more expensive and still heavy. It offers even better protection from slashing and piercing, but reduces mobility, reduces stamina regeneration and is still susceptible to bludgeoning strikes.
Silver Armor - expensive Plate armor, made by combining Steel with Silver, as a result has lesser durability. It does offer good protection from slashing and piercing, but also protects user from negative magic effects. Still bears negative effects of plate armors.
Dwarven Armor - rare Dwarven armor, very heavy and very expensive. It offers very good protection from slashing and piercing damage, but reduces mobility, reduces stamina regeneration and is still susceptible to bludgeoning strikes. It offers additonal protection from Fire, since Dwarven metal has lesser thermal conductivity.
Ebony Armor - exquisite Ebony armor, slightly lighter than other Plate armors. It offers great protection from slashing and piercing damage, but reduces mobility, reduces stamina regeneration and is still susceptible to bludgeoning strikes. It offers additonal protection from Shock, since Ebony is not a metal, but a volcanic glass.
Daedric Armor - legendary Daedric armor, heaviest and most valuable of all. It offers best protection from slashing, piercing damage and even protects well from bludgeoning damage, but still reduces mobility and stamina regeneration. It offers additonal protection from Frost due to the fierce nature of Daedric spirits inhabiting the armor. It also strongly reduces wearer's Personality attribute.
P.S. Seems like I am not the only one collecting concepts
This topic will get cramped soon I feel!