I'd also appreciate it if it had a way to duplicate a block in place. The reason for this is that you can of course do ctrl-c + ctrl-v but the problem with this is that if you do that the pasted block will appear at a distance and there's no way to get it to paste it even remotely close to where you want it.
See copypaste.png (1521×598) (mroman.ch)
I copied that block and used crtl-v and tried to place it next to the block I copied. There's no way you can do this because for some reason the pasted block has some huge Z-offset and you can't get it down to the ground. So in a way you just have to place it where it's at least somewhere visible on the screen and then move it tediously into place. It would thus be great if there were some command/shortcut that duplicates the block inplace (where it is) and have it selected so that you can immediately move it.