How about instead of a world-edit, the protection for the town would just be transferred to the new area. Granted you would free up your town to the wild, but if you want that area bad enough you'd just rebuild. All residents of that town would also have to have the 7 day notice (or whatever the proper length of time is) to move their belongings before the protection is removed.
What about the ability to move / relocate the protection? With the new claims it would all you to take a close by town and align / join it to your town Sent from my iPhone using Tapatalk
Or, instead of literately moving a town with it's belongings, this can simply just move the protection of the land and leave elsewhere behind.
Though this idea is tantalizing, I think this could cause a great amount of strife as Kuke and others have pointed out. Your main concern is you want to connect with friends towns right? What if we could to town-town portals between people? You wouldn't get shared construction zone, but it would make transportation easier for people who do not have TP and access to /warp <name> commands.
One advantage of this is say you claim a town that's like 80 blocks away it would allow you to move the protections then buy a new town Or like me my mayor town was beside a friend.. We not friends anymore but there's no where for me to expand that town so if I could move it to my prez town it would be nice Sent from my iPhone using Tapatalk