It would probably have to make a new add-on every time you use it, but I'm sure it's possible. Like some brick making GUI I got a while back.
I really love the re-size the feature on Roblox. But if a re-size feature comes, we may also need another tool that can drag it...which has been done already in the Mission editor (except that doesn't always grab every single brick).
Didn't RTB or AiO have this before retail?