If Barcelona have not yet overcome the financial crisis, it would be foolish for them to buy more strikers next season. The Barcelona forward is now stable. They need to increase the strength of midfield and defense. If he can't strengthen the defense, it will be difficult for Barcelona to win the title next season.
Agree, they don't really need a new striker like Lewandowski. They already have Aubameyang, Luuk De Jong, and Memphis Depay, these 3 strikers are more than enough for Barcelona. Barcelona only uses 1 striker in their usual formation, they rarely put 2 strikers on their attacking line. So, what for to sign another striker?
For midfield and defense lines, they also have enough players. They actually just need to improve their quality, not the quantity.