A true rebuild? What do you man by that? We have many young and talented players in our squad but they need a proper guidance. They need a manager with a clear idea and a long term plan.
He should either come now and implement his ideas in developing players (Pedri, Gavi Fati, De Jong, Araujo...) or he should wait for another 10 years. If another coach is willing to put this heavy burden on his back, than that person should enjoy fruits of his work. It would be totally unfair to give Xavi a finished product in 2 or 3 years time after someone else prepared the field for him.
Regarding Pep comparison, he will be always compared to Pep. This won't change now or in 10 years. We are all aware there is a 50/50 he will fail or succeed.
Yes, I didn't mean someone else builds the team only for Xavi to enjoy the fruits. But that I'd rather see him as the next one in line after he's done something with his coaching career and a coach with some recent European experience, preferably some results and a vision has served a stint at Barca.
It won't take 10 years, let's be realistic. There are no Fergusons out there.
I listen to Xavi's interviews and can't help feeling he lives in the past. Still thinks (like a good portion of our forum) that the way we played under Pep is the way to go if done right. I think he's in for a rude awakening and will take lots of work to create a contemporary style to seriously challenge for big titles.
Regarding youth development, Xavi has done none. Nothing suggests he's the right man for the job. Zidane was a legendary midfielder, yet he's not great with kids.
Long story short: don't know why we'd hire Xavi next.
