From start we weren't the best offer, he had better offer with Frankfurt and now Spurs are said to be offering a package that could reach 20M. That is significant difference from the 6M initial offer.
Barca has way too many young players in his position, even younger ones than him. Fans were already asking why signing another CM.
I would say that under Deco we have put a financial limit to those highly rated prospect, so naturally we lose many. But this mostly because we are now targeting the 10M+ prospects rather than the 1-5M ones we were used to.
We finalised Darvish deal with ease, because he was in our usual cheap category.
Many fans wanted this, but it comes with significant costs as there is a bidding war with those sure things. Arda, F.Diaz, Echeverri, Guler & Bergvall of the world.
People keep using the term "closing the deal" but in reality what does it mean? Those guys has agents whose work is to use every way to maximise the potential earning and career of their client. You could accept all their demands and they will use your offer to leverage it to other clubs and get even higher deal. The "close the deal" is assuming that those agents are incompetent fools.