Vacant estates are available for any random noble wandering by to claim as their personal estate.
Wild lands are lands that are not assigned to any estate, and thus are not available for nobles to claim.
So if a lord does not want additional knights, they can either assign all land to occupied estates, or leave all excess land as wild. Since estates can be arbitrarily created, destroyed, and re-sized at the lord's whim, this is easily done.
eh... they claim it.. and then you boot them out the same turn/next turn? it doesn't cost a thing to mess around with estates, does it?
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tax rate... you can't collect more tax from a region with higher tax rates any more?
sounds as if a region has X peasants and produces Y.. then that's it. you can divy it up how you want.. but won't get more out of it (until estates do something?)
