Like most have said, adding clans was a good move, but we just have a few features that make it very underwhelming and it's a missed opportunity to add more strategy to the game.
For instance, I like the tiered system. It's a fairly good way to give the player some sense of progress and kind of shows where you stand at in Calradia; you have a limit to the companions,enterprises, etc so that things happen more organically.
But at the same time...the game doesn't restrict the player. You can just speak to everyone and marry anyone. I expected to marry into a clan that would match my tier, give or take one tier level depending on your charm, if you will.
Also, the clans offer the same type of quests/rewards, and regardless of your tier for most of the time. I am aware the lords/notables don't offer you the quest if you don't meet the requisites, and that's what baffles me - it should be like that until we work our way to the clan 6, gradually having different (and better) quests until you get there.
Lastly, the clans should overlap kingdoms, making it possible to allow your clan to prevent a war between two kingdoms because you serve both; And the members of a clan should obviously act by themselves, having Individual opinions and leaving the clan if they are at odds with the clan leader.
Unfortunately that's where CK meets M&B, and it's not going to happen.