This Barcelona squad will need at least 2 more years to get in shape and in the situation to be on the top tier teams in Europe. But at the moment, they are a lower A-tier team I have to say.
But I have to admire Xavi with how well he has done with the huge duty on his shoulders. Even at a time, Barca weren't even top 10. But now they are 5th placed and the influence of him on the squad is visible. I'd say that give this team time, and Xavi some more time, and Barcelona will turn around.
I believe it is not even about being in more shape, they need more players. They do not have players that play with Barcelona tiki taka style that Xavi grew up with and now uses as his tactics. Don't get me wrong, there are some players who uses that tactic but not all of them. Which is a proof that they need players either coming from youth like ansu fati and pedri.
They need to also stay healthy as well, ansu show some brilliance when he played but keeps getting injured all the time, I do not think that you can be a star player when you are always injured. All in all I believe that we should probably see Barcelona change a lot of players in order to get better, not just getting used to the tactic and all that.