The problem with the one handed backhand is that if you can't hit a topspin drive, you end up just blocking serves back and it is really tough to break through. I'm guessing that the top spin backhand return is one of the toughest in the game.
A weak backhand just puts pressure on the rest of your game. To those of you who only slice your 1 hander, what do you do on returns?
Isn't enough to see that a garden is beautiful without having to believe there are fairies living at the bottom of it, too?