It seems that Xavi is very satisfied with the striker he currently has, Lewandowski presence has revived Barcelona front line, Xavi still has a stock of quality strikers that he can rely on this season. Barcelona has no problems at all in the defender position, while the midfielder position is already filled with quality players. Gundogan arrival can be a new wall for Barcelona in keeping the central area solid.
Lewandowski was able to answer Xavi's wish by scoring goals in his first season with Barcelona. It is undeniable that Xavi must look for Lewandowski's cover because Ansu Fati, Ferran Torres, Raphinha, Dembele are not pure centre-forwards.
Barcelona's ideal 4-3-3 formation is slightly advantageous if Xavi defends with one centre-forward as a winger can be a goalscorer assisted by a creative midfielder but there are times when Lewandowski gets injured and will turn into a weakness. At least that's what I feel.
Barcelona decision to sell Aubameyang and then replace it with Lewandowski was very correct, Lewandowski was able to answer Xavi trust in him by helping Barcelona win the La Liga title race as well as the Super Cup. Lewandowski was also the top scorer last season which made Benzema fail to win the top scorer title twice in a row.
Xavi can still rely on Ansu Fati as a substitute for Lewandowski if there are problems with his health. Raphinha is starting to blend into Barcelona style of play, he can be relied on on the right wing. Lewandowski certainly cannot always be played in every match, especially since Barcelona match schedule this season is very tight, Xavi needs to rotate in several matches in order to maintain the fitness of his players while preventing injury to his flagship player.