Emery is a good replacement if Xavi leaves.Emery would be good . I think the players would respect him.
He's clearly a better manager than Xavi. People criticise his stints at PSG and Arsenal and use it as proof that he's not cut out for a big club. However, PSG are a basket case and it's taken a long time and a lage amount of money for Arteta to stabilise Arsenal. Arteta was on the verge of being sacked too.
I think he jump at the opportunity but then again I could be wrong. No funds to spend is not an attractive proposition for any manager.