yeah that would be awesome to have in the build menu!
say a invisible block you could lay out ,than they would go dig it out for you.
even if it was a a reduced mineral return and it took them forever to do it, it would certainly solve getting an area leveled off without those pesky accidental potholes
My biggest gripe with skilled NPCs isn't seeing there skills before hand. I have no problem putting down 4 new beds and going get new NPCs to fill them. When I get back to base I put the skilled ones on the right jobs and just keep the non-skilled ones as warm bodies for the machinery time bonus.
My problem is when you find a fantastic NPC with massive skills early on, you keep them as a follower throughout the whole game, an when you finally get your base there is no easy way to add them to your base... there is always the chance that when you free them that they might disappear forever!
I wish you could just drag there follower icons to a bed slot...