We need more sandbox elements. SE should use their power to try and realise the ambition of small companies like those behind Mortal Online and Dawntide, companies which dont have the power to bring such ideas to fruition. NPC-approved structures don't really seem very fun to me.

ArcheAge is implementing something like player-made structures, but so far it's only housing I've seen. But even though it's small structures, players can build them almost anywhere they desire. That's true freedom.

SE likes to stay in absolute control over everything, so giving players power to change the landscape is something they probably won't do.