Xavi intends to strengthen Barcelona in the off-season and he is going to place a big emphasis on strengthening the attack. And I was surprised that he said that they would have to sell (or lease) Lewadowski, since he doubts that he will be able to achieve the desired form, hinting that at 35 it is difficult to do this. So Lewandowski left Bayern in search of new achievements, and now he may be left with nothing. Although for now these are just rumors, but if they are already talking about it, anything can happen. And Barcelona definitely needs to strengthen their attack.
Lewandowski has played for Barcelona for two seasons and in the first season he really performed satisfactorily by providing 23 goals with 7 assists for La Liga and 5 goals in the UCL, this season Lewandowski provided 17 goals with 8 assists in La Liga.
From all this, Lewandowski can actually still be said to be quite sharp striker even though he is 35 years old, if Barcelona let him go it would be very detrimental and Lewandowski this season is not too bad.
If I personally give an assessment, Barcelona decline in performance has nothing to do with Lewandowski because he has also played very well, but several other players have experienced decline and made Barcelona appear not like last season.
If the other players can play well and Xavi can work properly then it is possible that Barcelona will not be like this and Lewandowski can definitely have more goals and assists, the decision to throw out Lewandowski should be considered lot.
Moreover, the rumors about Lewandowski sale option are not because he is performing poorly but because of the salary increase that is burdensome for Barcelona, but considering how he plays I think it is worth the big salary.