The only real problem with the game is that:
The computer is cheap, unrelenting, gifted with superhuman reflexes, doesn't have to input commands, reads your mind, and completly whoops your ass.
OR
The computer is dumb, slow, punching bag, and all around easy.
Maybe in Soul Caliber 4 they can fix the A.I. to some kinda middle ground, so each fight is challenging but not impossible or ridiculously easy. or they could impliment a difficulty level system for the one player modes like everyother game on earth has.