First , i know what you're thinking "Land Claim is useful" But no , imagine being in a cave and THEN you cannot break that iron ore Becuase you're in a claimed chunk, C'mon! this make life a lot harder! i suggest you to remove land claim! or i suggest updating it and adding a new system i can call "Chunk sorting" So when a world generate there's caves , right? well then make the caves area a "Cave chunk" and add a rule like this: "You cannot claim Cave chunks". Iam sure there's somebody that might agree and somebody that might disagree, But this is my opnion.