My first impression of the mod is that it seems okay so far. I do have a long list of suggestions but you can take them or leave them as you wish of course. Mostly they are about rebalancing.
These suggestions are not meant to be comprehensive by any means. These are just some things I noticed from a short time playing. Wall of text to come...here we go:

First a couple of items:
Rawhide Coat armor value too low (10). This is worse than thin cloth items.
Ash arrows cost more than Yew Arrows but do less damage.

Next, Horses:
All horses seem to have armor values at or close to Native which is too high for good balance. Other stats including health and charge values can remain the same but armor needs a nerf. I suggest reducing all horse armor values by about 30%. I know that is a lot of values to change but I think it is going to be for the best.

And the biggest section, Troops:
Overall I noticed that skills tend to be used a bit too much to differentiate high end troops and proficiencies are not used enough. High end troops should get proficiency buffs for those weapons they use. Gear quality and appropriateness was uneven and sometimes too good for a given rank in my opinion. Specific cases follow.

Swadian Paladin - stats & gear do not make sense for the rank when compared to Swadian Knights. They are worse than Knights but ranked higher. They also get some horse archery added but no missile weapon which does not make sense but doesn't really matter.

Vaegir Watcman, Vagir Veteran Watchman - OP compared to similar rank archers

Khergit Swordsman, Kergit Elite Swordsman - 2H proficiency is lowest of those with points but is the only weapon type used.

Khergit Chu Ko Nu - Could use refocus towards speed (rate of fire) rather than damage. Buff agility and weapon proficiency by a large amount and switch to a faster firing crossbow with less damage.

All Khegit crossbowmen - Have too strong crossbow types. [debatable]

Nord Berserker - Come on. They look stupid with that helmet. Pick a different one. Also their stats are OP for their rank.

Rhodok Man at Arms, Rhodok Knight (cavalry) - Weapon choices could be better sutied for role and lore. I would suggest Fighting axes, shields, and light crossbows instead of lances and short one handers. 1H cleavers can stay.Don't forget to give them both Crossbow proficiency. The Rhodok Knight needs better head armor but keep open face to keep a plausible match with the use of missile weapons [visibilty]. Get rid of the mail coif and have Kettle Hat and Bascinet with Aventail instead. Optionaly you could buff the armor value for the Kettle Hat since it is a combination of a mail coif and helmet after all so should be better than the value given in Native. Both these troops could also use more athletics for use when they are dismounted. It would make sense to me since they live in the mountains.

Skirmishers in general across all factions seem a bit too well geared for their ranks.

Sarrinid Infantry, Sarrinid Guard, Sarrinid Immortals - need buffs in power strike & ironflesh

Sarrinid Archers of all ranks - Need need a bit more power draw and at least a tiny bit of power strike

Nord Archers of all ranks - Need 1 point of power strike added. Melee weapons need a rethink, including those from Native. Perhaps a short 1H that is fast and / or high damage instead of fighting axes. 2H axes might be okay even though it is kind of a stretch to believe they would somehow carry them around on their backs.

Nord Raider - Has thrown weapons but zero proficiency and power throw. 1H battle axe too short for effective mounted use - swap with a fighting axe. Also needs at least a hat if not a helmet. Its cold out there.

Mercenary Black Knight - Needs slight buff in ironflesh and / powerstrike.

Jade Guard, Jade Ronin - Maybe OP ironflesh and powerstrike. Could nerf slightly and buff proficiencies greatly instead.

Forest Bandit & Woodsman line - Nerf power draw slightly and buff bow proficiency instead

Mountain Sergeant, Mountain Knight - Gear is too good. Ironflesh & power strike is too high. Athletics is too low.

Sword Sister - Remove crossbow and replace with a light crossbow so it can be reloaded while mounted. Skills and proficiencies could use a buff.

Shield Maiden - Nerf power strike a couple points and give a significant buff to 1H proficiency and agility instead.