Can you explain what you mean? I dont have CK2 or whatever, so Im a bit confused.

E:WoM (and CKII) had dynasties, so that you could have your sovereign marry another hero and make little hero babies, which could in turn be married (off). 

Nasty. Even without the constant inbreeding.

Personally I disagree. We can barely manage the heroes we are already getting due to limited XP on the map. I haven't played WoM that much because it was broken and actually discouraged a person from playing, so I cant back up my opinion but I think the developers removed it for a reason. 

If you look in elementaldefs (found in C:\Program Files (x86)\Steam\steamapps\common\FE Legendary Heroes\data\English for me) there are Dynasties, they're just disabled (probably cause they're buggy as SHIT).  I was wondering what they were when I found em so I looked em up here, gonna turn it on and see how it goes.  Will edit this once I find out.