I can agree with that, but defence should start with goalie first….
GK, a starter quality central defender, and one or two good fullbacks for depth. The worst 2 positions in our starting 11 are CB and GK. Kounde and Balde are starters and they will continue to be starters most likely, the issue on the fullbacks positions are the back-ups in case they get injured. If both of them get injured at the same time like vs Inter, it's really bad.
But with GK and CB pair, neither of the 3 players are top quality. All of them make constant blunders.
You can do with Garcia, and promote that La Masia kid they say is good, but you need to loan or sell both Fort and Martin and bring in a solid player instead.
The signing on LW should be a loan. Like Joao Felix was. Some player who is not wanted by his club but can do much better at an elite, well-drilled attacking side like current Flick Barcelona.
Joao Felix in 2023-24 was far far far better than Ansu Fati. Instant improvement on the wing in terms of rotation.