I truly hope you realize these are all very easily accomplished, and the most complicated process I believe would be adding in the animations for the drawing and returning the weapon to it’s slot. But before I begin, I will go and point you to observe some of the mod authors in the Skyrim community, who have already tackled these sorts of questions and answered with grace.
First: They did already designed the swords and other weapons. And while you suggested they all design a look to match each and every weapon. There’s no need for that. In most of what they have already done by separating items, armor, building blocks into separate tiers. It can also be one in it’s sheaths. T1, skins, hides, and or cloth can be used with twine to hold the weapon. The T1 weapon models have already been made and can be used in creating these models, such as exposed hilts. T2 models can use leather and animal skins, with leather or thick leather. The hides, skins, leather or cloth models can share already in game assets. The models are already there. Now for T3, shaped wood or insulated can be utilized and at this point, you can use costume art work, graphic designs. These things are already there, and just the effort put in, but it’s not going to be as demanding as you suggest. Break the sheaths in into tiers, separated by what is used in it’s construction.
Now, up is the author of RaceMenu, Expired. Here’s a link as to show you what they have done.
https://www.nexusmods.com/skyrim/mods/29624 But to break it down, they had added additional sliders in which can be utilized to here in the adjustments of weapons and what positions.
Up next, another link to another author who also addressed this. https://www.nexusmods.com/skyrim/mods/68000
This basically allows you to place your preference to the degree of where you want your weapon to go. Now it doesn’t give you unlimited options but the choice you have are VERY satisfying.
So this will solve your entire 2nd paragraph. By following the small examples of players, like us, who have paved way, and that can be look to as examples of what to do.
Now to your third, the quick wheel is nice. Not amazing but ok. Very limited actually. Now as I suggested, these sheaths, crafted in a artisans bench, can then be equipped, to the new body slot that would have to be added in. The items in your quick wheel do NOT need to utilized, and in fact, would suggest that the quick wheel be it’s separate entity.
Ok, two quick wheels, you bring up your first as always, click left joy stick to swap over to combat quick slots, and click again to non combat quick slots. These “quick switches” will only need to be changed in it’s order as you change it. So you start off, bring up your quick wheel, which starts off in non-combat, so you switch it to combat, your holstered items come up, ok, you close the wheel. Now your character is displaying that he is armed and ready to go. Understand? The combat quick wheel is the only wheel that be equipped with weapons that are in your current holster. You see now? So you craft up a long back sheath, for a pike or a two handed sword. You equip the sheath as it’s own piece of equipment slot, now from there you equip your weapon to that sheath, so it’s now added to you combat quick-wheel. I suggest we be allowed two sheaths and a holster. So One two handed, a one handed, and then a bow or daggers or, a bow with a one hand and daggers… You understand?
The question is, “Does this bring worth and value to an already awesome game?” We all know this will be an epic step in Conan, one little one for veteran players haha, But a little coin always helps to grease the wheels, and I would pay for an added extension and I’m sure many others will to.
Don’t be lazy.