I don't think Barcelona would be looking in Fabregas' way anytime soon, he wouldn't have gotten play then and he wouldn't get much play now...we have better players for what he does. Deco, Xavi, Iniesta, Messi and Ronaldinho unless he wants to continue investing in bench time.
If Barca had to have either Kaka or Ronaldinho in their team which one would work better?
It is extremely hard to measure that especially since currently Ronaldinho has won World Player of the Year twice at Barca a Champions League and two la liga titles with one more on the way alongside the spanish cup ( Copa del rey) trophy. At Ac Milan, Kaka lost the Champions League final after being 3-0 up against liverpool, no league titles, no italian cups...perhaps it is bad luck, but clearly even Ronaldinho's bad luck still have a very good chance of winning two trophies this season, while Milan most likely will not win anything. Kaka plays very similar to Messi, so in more ways than one, it would take alot for Kaka to be more effective than Ronaldinho, especially as Ronaldinho sets up more goals for Messi, Eto'o, Guily etc than Kaka for Oliveira, Gilardino etc.
Another note, that gesture that Dunga is putting over is absolutely not funny. First he gives Ronaldinho, some funny #20 or something and now the disillusioned #7 rather than the mythical#10 he so rightfully deserves and earned as shown playing for Barcelona. Nobody except Brazil's rivals are smiling and not all either.
The best player to fill Barcelona's midfield talent is someone like Gattuso, Makelele, Viera - aka sort of proficient in defensive midfield duties similar to what Edgar Davids did the first season he came and left.
JOGO BONITA!