No, it would not, only Tomb Kings should be allowed to hold land, except for the temple held by the Liches, but there should also be landless Tomb King claimants.yep all 3 removed, could it be written in away that is if you are the ruler you have the tomb king trait, the temple vassals have the liche priest trait and the others have the servant trait, would also work so the king has the tomb king, and say a duke has the servant trait?
The problem is, we do not know what is the event causing the switch, once it has been found, it can be easily corrected.