If we evaluate the last year, then Barcelona should improve the attack, this would greatly help the team in the future.
I think Barcelona has thought about this because they got tickets to the champions league which is putting pressure on Barcelona to get transfers of new players who can give good performance for Barcelona. if compared with last year I think Barcelona has not had any changes and it's still the same it's just that they haven't been able to find a replacement for Messi who was once a leading player at Barcelona.
Barcelona's only target this season was La Liga. Barcelona team was not interested in Champions League or Europa League matches. And they didn't play well in the Champions League and Europa League either. However, Barcelona will definitely want to do well in La Liga and the Champions League next season. And so they definitely need to strengthen the squad. Barcelona's defence has been very strong this season. However, Barcelona need improvement in midfield and attack. They need more experienced players in attack and midfield. Besides Lewandowski, Barcelona needs another regular scorer.