I hadn't come across this prior to reading this thread. But, hasn't one important element been left out, namely that an outside ball has to be returned to your opponent's outside (actually, shouldn't you always hit to your opponent's outside unless you've gone straight down the middle?).
Seems to me if you hit cross court but to his inside, you're dead meat. Also, are you meant to adapt if your opponent just stands there anticipating where you will hit?