I can't believe in Barcelona completely after seeing their performances against big clubs. They have had really unsatisfying results in those games. This was even the main reason why they couldn't qualify from their Champions League group. Xavi's priority should be to fix this first. Because they don't have any other issue than this actually to be successful in multiple tournaments.
Manchester United are just as usual. They are still not a very consistent team. They are dealing with big issues about having comfortable wins. Because their attackers are not having a great time. If this scenario continues they are likely to stay as the underdog. I still see Barcelona one step ahead as long as they deal with their main issue.