Quick idea for multiple lieges

[Slime99]

Maybe having diplomatic deals between rulers could help? For example William the Conqueror could provide France a tithe from his Norman holdings. Kind of like how suzerainity works in CK2, but it'd function more like HRE from EU4. Some treaties with others could opt out others and the treaties could die out with time, if not upheld by the other partner. Enforcing the treaty could be a CB or a diplomatic function.

 

[Torngasuk]

As long as the feudal relationship between vassal and liege is based on the title rather than the holder, and inherited titles maintain the relationship when passed on, I think the current system doesn't require that much modification for it to work right. If you hold Kent and Nevers, you pay homage and pay your taxes to the King of England for Kent and the King of France for Nevers in peacetime. If war breaks out between the two, you pick a side, usually dictated by the realm in which your primary holdings reside, and risk forfeiting your titles in the relevant realm should you pick the losing side, or you try to stay neutral and risk the enmity of both lieges after the war is done.

 

[guinea prince]

If you hold Kent and Nevers, you pay homage and pay your taxes to the King of England for Kent and the King of France for Nevers in peacetime. If war breaks out between the two, you pick a side, usually dictated by the realm in which your primary holdings reside, and risk forfeiting your titles in the relevant realm should you pick the losing side, or you try to stay neutral and risk the enmity of both lieges after the war is done.

I just got a shiver from that.