With worldedit in MC is can create a sphere, a cylinder, a wall, a block, etc.
I agree that a build tool like this should be metered. In many MC servers, spawning over 1000 blocks causes some lag. Right now in starmade we can put out 1000 blocks (10x10x10) but only in a geometry that doesn\'t do a lot for most builders in many scenarios. If that 1000 blocks could be spread over a vertical or horizontal planes then it would be much more useful.
Also, the copy/paste functionality and /stack of worldedit, while difficult to master, would be very handy,