I think Lewandowski is still very suitable to be at Barcelona. Although this season his performance has had ups and downs. However, in Barcelona's last match against Valencia, Lewandowski proved that he still had great abilities by scoring a hat trick against Valencia. So even though he is quite old, Lewandowski still deserves to continue his career at Barcelona. Because it has been proven, this season Lewandowski was able to bag 23 goals with Barcelona. Apart from that, if for example next season Lewandowski decides to leave Barcelona, who knows which team will be willing to recruit him. So staying at Barcelona is the right choice for Lewandowski. Apart from that, Lewandowski still has quite a long remaining contract at Barcelona so it would be a shame if he chose to leave.
Because, for example, Lewandowski's contract at Barcelona has expired (in 2 years). If Lewandowski's performance continues to be good, I think his contract can continue to be extended at Barcelona. So that way, Lewandowski could have the option of retiring as a Barcelona player. And I think this option is very good for Lewandowski.
And in essence, this news is very encouraging for Barcelona and its fans. Because to be honest, it will be very difficult for Barcelona to find a new striker if Lewandowski leaves Barcelona. Moreover, Barcelona's finances have not yet fully recovered.
Lewandowski is a great striker. He's still got the fuel in him to net in more goals. He's agile, skilful and his goal scoring abilities are at the peak. Although age is calling gradually but he's still got a bit of time in him to show his worth in the public and projected games too. Although like Ronaldo, even at the age he is, he still kept the zeal on. I don't think Lewandowski's case would be any different.
Let him still use the ample of his time left to do exploits. He's got European cups and tournaments to journey through and in him, there's all that it'd take. Age is still favourable to him and he doesn't look like he'd slack in a few years to come, so for the mean time, he's got to enjoy his playing time before thinking of retiring back to the Arab league or quit football generally.The striker can still be a useful asset to the Spanish side.
Despite the ups and downs, he's managed to stay in form and shape, he still does well to net in goals when he's got the chance to and so far his rate of play isn't really any need for alarm. The club themselves know how advantageous he is and also how difficult it is to get an active striker in the market now. So they've just got to stick to appropriate terms with him and also try to work with him as he strives to do his best in being relevant in the team too.