Country: Iceland
Fabregas at Barcelona was a bit like Arshavin at Arsenal: he had the numbers, but there was something missing. He never really established himself in the team, and after the huge song & dance they made about signing him it doesn't reflect well that he was hounded out. It might seem harsh to call him a flop but when you sign a player of that calibre the expectations are high. He didn't live up to them.
Honestly don't think it was right call from Barca to sell him. Nobody gonna tell me he wouldn't have good few years for them if he stayed there. It is hard to call him flop IMO. Overall it was decent return from him for the club and they won trophies.
Don't know what the debate really is. I think we have been lucky to have both Fabregas and Özil. Great players!