Barcelona are a great team. (The best if you ask me) They play a brand of football that impresses everyone. Their style is very creative and depends a lot on smooth flowing short passes and holding onto the ball as long as there isn't a clear chance. The creative genius of Xavi in particular and the trio (aka The Trident aka The Trinity) of Xavi, Iniesta and Messi is general, more often than not, prove too much to handle for opposition teams. None of these players is leaving anytime soon so why is everyone related to Barcelona talking about signing Fabregas like he is absolutely needed?
An extremely talented creative midfielder. The moves he creates and the passes he gives are exceptional and he can score goals too. All that creativity, most people argue, will be good for Barcelona who already have one Xavi who does the same.
My argument is simple. Too many cooks spoil the broth. Too much creativity in the center might be good if you have a lone striker in front but Barcelona almost play with 3 strikers. Yes Messi starts behind the strikers but regularly dribbles past defenders and ends up scoring more than the actual strikers (Ibra/Villa, Henry, Pedro and Bojan). With so much fire power up front, with Messi floating around looking for the opportunity to burst into the box and Iniesta close-by to compound Xavi's creative efforts, and take occasional shots at target, where would Fabregas fit in?
But what if Xavi is injured?
Who can fill his shoes if Cesc Fabregas is not there? On such a day, Pep Guardiola can switch the team to a 4-4-2 formation with Messi stepping back into midfield to help Iniesta, Busquets and Mascherano because with the arrival of David Villa the front line is more potent and one can expect Villa to add the sort of clinical striking to Barca which could allow the coach to use Messi in a more creative role to supply passes and through balls which is actually pretty good at. (And then occasionally dribbling past defenders and scoring.)
In the end, I have to admit I would love to see Fabregas playing with Iniesta and Xavi in place of the overrated Busquets (ignoring the fact that Busquets plays as a holding midfielder but hey, Barca have Mascherano). But then again, I would love to see Rooney and Messi play together too.
Barca does not "need" to sign Fabregas right now since e does not solve a problem that has no other solutions. Let him play at Arsenal. It will be good for his confidence. One more season at least.
(P.S. There are obvious economic reasons too but I think its better if we stick to footballing reasons)