I'm not suprised at how he's beginning to gradually excel at Barcelona as a  manager, I mean he's a club legend and has had a good experience as a player for the team, so that's a plus to his managerial career at Barcelona, and I think he'll make a great start manager as he did as a player, some seasons ago, alot of Barcelona fans were complaining abou his incompetence and said he's not a suitable candidate for the role and their team needs a more experienced manager but I told them to be patience with him, cause he needs time to build his team and start succeeding and i was right after all cause the club's patience with Xavi is beginning to pay off, and one thing I like about him is that he's built his team with a good number of young talented players and give them opportunity to shine on the pitch.
  Well I think it would be quite uneasy to find a player that would replace Messi but I believe their are young talents out there that are still yet to be discovered and Barcelona as a team are good at discovering such talents and help bring them up through their academy just like they did with Messi, well I hope they discover the next Messi sooner.