I'm a little more pessimistic. Those are definitely bad news for us. Ballack may have surpassed his prime, but we didn't only lose a solid 6er, but also our captain. There's a lot more to a WC than the 90 minutes on the field, off the field can be just as important for the team's spirit and chemistry. Besides, we were just about to play with a double 6er with Ballack and Schweinsteiger, which would have been a great backup for a very offensive midfield with Özil, Kroos, and Marin. All the players you mentioned may be faster and younger, but most of them lack experience and you can't win a WC without at least some experienced players.
We have some busy and dubious weeks ahead of us. And fuck the Boatengs. Both seem to have a serious anger management problem, which can really harm a team in the long run. If you don't fit, you can be the best player in the world and still make a team worse with your brainless antics.