While I agree with the ideas you propose, my concern is that region protections are too open to interpretation. For something like this to work there would need to be more unification of the region expectations.
Example. One rev I built a compound starting with the walls and building in. The moderator who created the protections for me protected the walls in 4 child regions, leaving the centre unprotected. This rev I did the same thing, but the staff member protected the whole lot and then some.
Or, instead of using claim fences to protect foliage, up the expected buffer without having to go stupid with regions.