Well he's been away for two years and the time at United probably cost him a lot of his confidence. But I think if he gets close to his former self he can lift Dortmund to the next level, because Mkhitaryan and Reus both need a bit of space to unlock the their full potential and Kagawa is/was exactly the player who could give it to them, by drawing out/binding defenders and quick comibinations.Watch him allmost instantly become a mainstay in that dortmund side again. feck me i want klopp managing united