L
Learo
Guest
You're forgetting his good performance vs city and many good performances in clasicos over the years.
He is also able to unlock defences with his through passes and vision and he is a goal threat. He gets in between the lines. You need to use him in situations suited to him. If you play him against atletico bus he will look shit because he can't get between the lines. Most attacking midfielders would also look shit in this situation.
Also who says he's going to replace Xavi? Fabregas is not Xavi, fabregas is fabregas and we should use his skills because very few players have them. He won't play every game and neither will Xavi. Different players for different situations.
Xavi replacement can be bought next chance available.
We have Sergi Samper which has to be groomed into a role for our first team in the next couple of seasons. That means playing both Busi and Samper. Keep in mind, Xavi used to be seen as the natural heir of Pep Guardiola at the DM position.