The midfield and centre backs are very strong. Kagawa is certainly going to be leaving and I don't see the problem with that. Gotze. Raphael is seen as a left winger and you forgot Schmelzer. Philipp too is very likely to leave in the summer. I agree, he is the player Favre probably should have tried more on the wing, but it's unlikely to happen. Buying a 5th CB, only makes sense if Toprak is leaving in the summer, which seems very possible. I don't expect any signings this January. I really worry how the team will deal with an injury to Reus or Sancho, or when the two are burnt out. I still think as good as Witsel has been, Weigl can cover.