You can already just copy-paste those commands. Actually i don't see any real use of it. You can even use a macro to achieve the same effect.
You get to rename over commands set by a developer or added by wildcard for in-game administration.
Also not necessarily just an admin command but if there was a way to rename Any in-game plugin command like /buy ingots => /ingots . All /ingots would do is trigger the buy function with ingots. Creating actual custom chat commands. I actually thought that's what this plugin was when I first read it.
There is a longer explanation to why this is useful but I'm not one to type out a long explanation right now, if you don't want to see it as useful.
Another time perhaps.