He's just friggin' lame, to put it bluntly. I can't get down with clubbing your enemies over the head with a stupid mega phone. I always, in all RPGs prefer the characters that attack with a sword. Then those with martial arts abilities, then those with a lance or spear, and then those with a gun. But never something as stupid as a mega-phone.

And then the fact that he is (or is controlled by) a Shinra spy just justifies me not using him. I didn't use him at all, if I didn't have to in my play-through of FFVII. Plus that dice limit break is dumb as well.