As a result of the new patch, (although there were some before patch), some of the rocks on our land are now under the terrain mesh.
This means they become imposible to destroy and are preventing terraforming and building. Now the Gms cannot destroy rocks, but maybe you could give them the ability to move them? Couse once they are surfaced then they can be destroyed.
Or make it so we can terraform around rocks so we can slowly reveal them until they become destroyable, just like you would normally unearth a boulder.