Ganso is the playmaker on Brazil's squad in a similar role to Kaka in the past. The only difference I see is Kaka has lots more speed but I Ganso's passing is better. He has played only 3 games for Brazil so we can't say he is failure, the jury is still out on him. Give about 2 years. He needs some experience in Europe.
As for Neymar and Robinho, neymar dribbles too much and while he will mash up the Brazilian league, that approach will not work in Europe and national team competitions. As for Robinho, he is overrated, plain and simple. Good club player in the right system but nothing more.
One of brazil's problem is the lack of a target man, while Fabiano was no ronaldo or romario, he was a very clinical finisher. Pato and Fred are not that type of player, they are effective as a 2nd forward.