I think claiming should be disabled in the end because, there has been a lot of griefing and water being placed everywhere and someone actually claimed pretty much the entire main end island. Claiming in the end should defiantly be disabled.
I think there should be a limit for a plot, how many beacons, chests, banners etc. because GIANT beacons and stuff like that can cause some serious lag and I assume it could probably crash the server (: