Ballack is like the decent chick at summer camp where all the other chicks are ugly. Because she is better looking than the other ugly chicks, she becomes "hot", when in reality she is only ok and wouldn't be noticed in the general populace. Ballack, IMO, is one of the most overrated players in the world.
Germany's general talent level is down from its norm and the everyone expects the best German player to be amongst the world's best. Unfortunately, in this case he isn't. He is the glamour boy of a glamour soccer power and therefore gets elevated to a level he simply doesn't belong. He is a fine MF and a well rounded player, but is he any better than Pirlo? Viera? Essien? Emerson?
I don't think so and I also think Chelsea wasted a shitload of money on him when they already have Essien, who is essentially the same player, younger and probably better.