I think this team has a lack in middle.. Messi is everybody, but if they have a guy like Paul Pogba, they can be the club the most dangerous for all others.. I think they have to change the defense line too.. Claudio bravo is not bad. But Jeremy matthieu... WTH is this guy ? One genius idea when he did several bad plays before...
They need a defender like Puyol. One that can replace him.. Not like Sergio ramos, playing too much on faults.
That's my opinion :)
Sorry if i did mistakes. I don't master all my thoughts and translate these. into english.