It's good if you have a character who has a particular command you want to use before you attack an enemy - like Steal, or in FF8 the Draw command.

Given that I am a horrific cheat (I lover Griever, and it's sister program, Jenova) at this stage of the game I damn well wish FF8 had it because I don't give everyone the Draw command (it's damn annoying that you can only pick three commands).