Possible lineup if Erik ten Hag or Xavi take over.

Goal Keeper:
Ter Stegen.. Look he's just not it anymore in my opinion way out of his Prime already Barca should sell him to make a bit of money and could get Unai Simon in return maybe.

Left Back:
could be either Gaya, Grimaldo, or even Tagliafico. Alba is not getting Younger he's still good but they should maybe look for a proper replacement soon.

Center Backs:
Araujo or Eric Garcia should do the Job next to De Ligt who knows he might not stay in Juventus next year so a Possible Transfer to Barcelona could boost his Career alongside De Jong they could show their skills just like in Ajax.

Right Back:
Dest, he's still young but not good enough to be the main RB in Barcelona Pedro Porro is the perfect starter in my opinion.

Central Midfielders:
Nothing to say Really we know both men they are fantastic wish Puig could get a proper chance once a new manager comes.

Center Attacking Midfielders:
Either Depay on the 10 or Coutinho no need to get anyone else atm Yusuf Demir could also play there he could really improve on both Positions.

Left Wing:
Ansu Fati 100% Starter maybe they could try to sign Barrenetxea he could be perfect behind Ansu Fati.

Right Wing:
Dembele has to do a bit better but I think he's still perfect for the Job same goes for Demir like I said he could be the 2nd Right Wing or even a 10th man

Striker:
Darwin Nunez is perfect for the Future of Barcelona nothing more to say really could even be a Starter.