Haven't checked this out, but something that would be nice if it didn't do it already would be to test the macro. Having extra frames to the right to set a target, focus, and so on. Then run the macro to make sure it's doing what you want. Of course you could do the same in game, possibly easier, but I find it annoying to test some macros in combat as I have to find a mob to test it on, or be under certain circumstances to test macro. I think being able to set up a situation to test macros would be a nice thing.