In eq next some people are worried about player-planet desolation. Within Everquest Next Landmark the voxels are very much manipulable similar to minecraft. I think the resource limits to do things to modify the environment with are the main limits on players. Want to knock that wall down, costs X amount of resource that took 30 seconds to a minute to get. taking out a castle? hmm, chalk up another hour of resources.
still would be unbalanced I think from the builder’s side as hours could go into it and in minutes or seconds be gone. However with sufficient rewards for both sides an ecology could emerge that balances.