Barcelona's performance in the last 3 seasons is very weak. Barcelona's performance has deteriorated since Koeman became Barcelona's coach. Although Xavi has been able to stabilize the team, he has not yet been able to form a completely strong team. Barcelona need more experienced players in defense. At the same time now Barcelona needs experienced striker. If Lewandowski joins Barcelona, I think Barcelona will be stronger. Next season, the title fight between Barcelona and Real Madrid will intensify.
I agree with you. Barcelona had a terrible performance with poor results under the leadership of Koeman. The last time Barcelona won the La Liga title was in the 2018/2019 season. Xavi had a great impact on the team. However, as you stated, if they basically improve their squad with a good striker and also strengthen their defence. Barcelona will surely be capable of competing for the League title with their rival Madrid.
It will be very difficult to happen because in this case they are still short of money for it and if they push then it is possible for them to dig the same hole as at the beginning of this season.
I personally prefer them to act more carefully. even though winning is the target and facing rivals in the fight for the title is a good thing but when they push themselves with dying finances then this can backfire too for them