My suggestion is that you can build wayshrines/portals/something on a deed and a person from that deed can travel to any other wayshrines/portals/something on a deed within the same alliance.
(wayshrines/portals/something need to be blessed with courier, higher cast means less karma use to travel)
maybe not active on pvp servers, since i dont pvp i will not say anything about that but i like this idea a lot and more uses for karma