I would like creative mode to have an option to mark points where you can build so many blocks between them so you're not spending hours upon hours to build really cool super structures like sky scrapers. It would make the game better I think.
Commands like /clone and /fill are not, and never will be, on any edition except for the computer one.
Imagine how mindblowingly tedious it would be to type /clone x y z x y z on an xbox. And even then, some people consider that cheating. So it will never, ever happen. Skyrim didn't have levelup cheats on xbox, Minecraft won't have fill cheats either. It doesn't matter how bad you want it, consoles never have any cheats or mods nowadays, only computers do. Believe me, minecraft is not going to be the one to change that. The console versions are carbon copies of earlier computer versions.
And one more thing, you need to learn how to google these things. When we tell you about /clone, you could just google "minecraft /clone" instead of potentially waiting weeks for some strangers on the internet to explain it to you. Better for both of us.