Yes, Barcelona want Lewandowski because they expect him to boost the team's game in their attack. If they manage to get Lewandowski but what they hope doesn't happen it will be a problem for them too. On the other hand, in my opinion, an experienced player like Lewandowski will slightly reduce the risk of him playing not as expected, rather than having to recruit young players.
I think the news about Lewandowski is over because there was no final decision on these negotiations until today, and barcelona have get Aubameyang, he is also Lewandowski's former rival in the bundesliga. I believe Aubameyang can be relied on in managing Barcelona's front line and help Barcelona next season. The combination of Memphis Depay with Aubameyang can be a solid team to face Real Madrid and Atletico Madrid who will be Barcelona's toughest enemies next season.