The Stuhngralor axe held by Captian Rhorlak 'The Might Axe' of Blacklight of house Stuhn, has a modifier that gives 15% knight effectiveness per dread. I'm assuming its supposed to be a flat 15% as 15% per dread is stupid overpowered, imprisoning your wife as the game starts gives 570% knight effectiveness total which incase you don't know why thats broken, altmorans have high prowess and that percentage acts as a multiplier to that where each prowess at a base is 50 damage and 10 toughness, so in example if you say have a son with 37 prowess, which you do, and imprison your wife, you have a unit with 10.5k damage and 2.85k toughness without influence of the combat modifier, making a singular heir stronger than a bone dragon in base elderkings.

Edit: Played with it for a year, and well, 1.7k knight effectivness and a ysgramor as a tributary later. I would have faught the elves but went into prestige debt to fight the returned immeditatly.

Landed characters seem to be unable to marry. The game treats them as ineligible and doesn't allow them to be selected as marriage candidates.

As the player I can still arrange non-landed marriages and family members who become landed seem to be able to marry on their own, but no one else. Effectively this just leads to every AI bloodline and dynasty dying off after 1-2 generations.

Did a clean reinstall and made sure nothing unintended was affecting game rules. Problem still persists.

I was playing as the Black Horde last night and noticed that I couldn't develop my holdings because I was a tribal government, but becoming fuedal requires a fully developed holding. I'm not sure if this is an oversight / gameplay decision from Elder Kings, this mod, or if I'm just not understanding something because I'm a CK3 amateur.