It is all nice and good if we have the nicest ideas to reinforce our squad and make lists of who to buy. But hopefully Zubi also realizes that this summer it is really time to spend big. The first option is, that our ban is just delayed and will be activated next winter and summer 2015. If so, we should take the money, which was planed to spend in these periods, and buy new players now. [Please don´t let them take it for the stadium...] Add depth to our squad in every area, not only in the defense. Because if they have the thinking that for every non cb we buy, another player of our current squad must leave, it will just bring us the same problems that we have now (only with other protagonists or in another area of the team).
The second option is that the ban will be arranged. In this case we also should spend big now. As we know Zubi won´t get us anybody new in the winter, even if it would be needed. A second bad season from our side could possibly make us less interesting to other players. Today we still have the big name and the victories of recent years still make people believe that we are the best team on the planet. Two consecutive years without an impact in Europe and/or Spain might erode our reputation to a certain degree so that our transfer targets rather go to Bayern or Real or Psg (for the money) because there they see better chances of winning the CL.
I know this is kind of dramatic and probably would not take place as badly as I described, but I exaggerated the situation to make my point clear.