Add the ability to select and move the entire base when changing it.
Too many times I have gone to copy a new base from the Internet and while building it, I realize halfway through I didn't place the townhall/castle/certain building far enough to the left/right or in the exact center and there's no more room to add further buildings. I build from the center out. It's very frustrating when I have to start all over again. A simple 'select all' option would be great.
Here's an example, this is a base I was building from the Internet;
http://i.imgur.com/iZDviAk.png
And this is the actual base;
http://i.imgur.com/4nPeG1y.png
You can see how an option to select all placed buildings and move them is needed, thanks for reading.