Sadly that might be a bit too ambitious for an MMO. The game has tried to make it work so many times before, and if it hasnt worked before then I fail to see how it would be different this time.
Unless you awnt to phase the world massively andmake the living world something personal to the player then we are almost definitely always going to get something similar to the Broken Shore where it's not so much a living world of building and rebuilding, but rather a constant wait for the bar to fill.