Whilst I don't agree with 7sisters assertion, you are playing with the facts a bit there Nazi-boy. If you exclude Banega (as there seems to be less concrete evidence for him) of the other 8 players you list 5 have played in the Bundesligia and three have played for Sven's former club. So there is a trend there.
Course, I'm thrilled because even if there is a bit of a trend, at least the trend is no longer signing as few players as possible as late as possible.