Hmm... copying and pasting multiple objects could have some issues (understatement lol). Probably the best and most commonly used way (by the player) would be to have the pasted objects be the same, as the crow flies, distance apart while being placed on the new ground without modifying the new ground surface so you don't have stuff dug into the ground or have ground spiking upwards at all. But some people might also want to copy the elevation changes that are in the selected area (for what reasons exactly, I'm not sure yet), but when that gets pasted, that pasted selected area still might need to be adjusted to the elevation of the new location so again it doesn't drastically dig into the ground or pop way out above the ground. So somehow the engine would have to save the elevation
changes in the selected area without pasting at the same elevation as the original. I'm not a programmer, so I don't know how hard that would be to do of course, nor if the engine is currently capable of doing that. I'm thinking it can though. I guess this having 2 (or more) options for copying and pasting multiple things is just an idea/suggestion really.