So far, Xavi is one of the most successful coaches in my opinion. Barcelona doesn't need to act rashly by sacking him and finding a replacement coach for him, that just increases the pressure internally on the club. Barcelona must respect Xavi and give him full trust this season, even when the club is still hit by a crisis.
I think whoever the coach is, Barcelona has the possibility of going down because of the depth of their squad, but this seems to be ignored by some of the mainstream media. Xavi is yet to miss opportunities in La Liga, the Copa Del Rey and the Champions League, so the management and fans will have to be patient about his work.
Xavi is not the problem in Barcelona's situation; he is doing his best to make sure the team regains it balance and the respect they used to have, but there is not enough squad depth to be a top competitor in La Liga this season due to a lack of squad depth, and even though Xavi tries to sign some players from various teams across the world, they are yet to become the Barcelona we used to know. Nevertheless, giving Xavi more time will give them a positive result because he has experience and can do very well if given more time.