Welcome, first things first: this won't be a complain post, and new things can be added when any of us comes up with it. If you have an idea how to solve something you can post it and maybe I can add it.
Lets start:
Archers being able to shoot you with their back sided to you: Well, can someone teach me how to do this, because that would be very nice, but serious, this makes NO sense at all, an archer walks away from you for any reason (you are an enemy of his faction) but manages to shoot you while moving away, and thus having its back turned to you. I never saw skeletons doing this, so I think that it is something in the code (you know, the code is good but Mevans still is no god or something so just like anyone he might make an error every now and then) but what exactly or how to fix it, I have no idea.
Traders having semi-infinite money: This is another thing I am like: ok... how is this even possible, I know it is a game but this is a bit weird, you trade with a trader, lets take an Galadhrim wanderer: First you sell 9 stacks of orc bones, for over 1000 coins, (this seems a bit odd to me already but this shouldn't be changed as it will make it LOTS harder to get rid of your stacks of bones), then you sell another 9 stacks of Warg Bones, again for 1000 coins??? and then, from deep in your backpack you get another 9 stacks of Iron you had laying around for months for another 2300 coins. No trader would wander around with like 4.500 coins in his pockets, nor will any trader have at his house. This should be fixed and traders should be capped of coins to like, 1200? coins.
Warg Bombadiers: This is something almost every Good player hates: He walks around in, lets say Lebennin and then there spawns a Mordor invasion, because he/she has 40 units with him/her, he/she doesn't run but starts fighting. All goes well but then, in like wave 4 or 5 1 Warg Bombadier spawns and does Boom, Player: Death, 40 Units: Death, those units cost like 800 coins or something, and 1 unit simply kills them all. So besides being hated and non-canon they are, for their power WAY to common, (not making them spawn in invasions is a very good start (this is for ALL the factions)) and they are quite cheap (25 coins !!!!!!!!!!, that is even less then a Rohirim when you have just the right amount of allignment) and atleast that should be highered to like 400, (that thing can murder a whole army on its own, that costs more then 800 coins)
Invasions: The rate these things spawn is crazy, up to like 8-20 invasions in Lone-Lands per in-game day, all of these invasions spawns between 30-70 npcs. How can ANY faction support that amount of units, and if we take a closer look at which factions this are: maybe 20-40% is Angmar/Hill Men (a DEATH faction) I am even more like, how is this possible, besides Lone-Lands being not lonely at all. If these rates are halved I think we are fine. Also, in some regions there simply shouldn't be invasions, I mean, whole Gondor can be attacked by orcs at any time, while in the books the orcs weren't able to cross Anduin until they captured Osgiliath during WotR.
Looting: You walk in a building, loot all the chests, wave the inhabitants goodbye and walk out. This is something 99% of us did, the npcs are like, Hey, welcome, ah you loot our chests with stuff we worked weeks for to get... No problem, bye. I don't know or it is possible, but if: Please let them react or make the chests locked, (lockpicking would be very cool and could be added in a trait system if that is ever going to be added), lockpicking chests would lower the faction's alignment by 1.
Elves not reacting on Mordor: Killing an elf should higher your Mordor alignment and vica versa, Mordor HATES the elves, they prevented Sauron from taking over ME, prevented Morgoth to take over Beleriand, and now they don't give anyting about each other.... Wait What????? that does make total sense.... (eh not), you would expect them to fight each other, but killing Mordor orcs during an invasion does nothing with your Alignment.
Uruks... This is somthing good players has been complaining about A LOT... Uruks being way to strong... In both the books and the films (atleast they did this right) Uruks were as strong as men, not as Elves. Rohan was kinda fine in defeating Uruks (well still they were absurtly out numbered but owell) but in the mod, 1 Uruk can simply kill 4-5 Rohirim before dying. Besides Rohirim armor being too weak, Uruks are Too strong, their armor is fine, but it makes no sense they have like 26 hp, (I am fine with Black Uruks if their spawnrate during invasions is lowered) which makes them a lot stronger then Gondorians and Rohirim.
For now this is it, if you have anything then tell me about it and if you have a better/other solution for one of the weird things I talked about then tell me. Also exept if you like all of it, there are posts with the same text as the things so you can kudo those.