With a tic tac scheme? I don't think so, that must long time adaptation, this is a big difference between Barcelona and Munchen using the long passing ball to Lewa. maybe a little stiff when first time playing with the strategy where he must run and move quickly to outwit the opponent. Exception if he only stands in front without picking up the ball.
With tic tac, tiki taka tactic, Aubameyang is a better option for Barcelona because he can contributr to the club at different positions. He can score goals, make connections, passingx creating space and contribute to defense by chweing ball.
Of course, as long as Lewandoski has a contract with Munchen he should be able to respect that. Although in some media it was stated that he wanted to leave because of his own will. Munchen have calmed down because they got Mane, although Lewandoski's form later dropped because he was not happy. But if Munchen wait until his contract runs out they will lose, because he will leave on a free transfer. I think they kept Lewandoski in for barcelona to bid even higher.
Lewandowski is not a player that matches with Barcelona tactics in theory. He is a very classic striker, does not have good speed, does not have good contribution to defense. He is like Cristiank Ronaldo and I don't think Barcelona need him and don't believe he can play good in Barcelona. Ibrahimovic failed there, Mephis failed there. I don't think Lewandowski is ready to risk a few last years of his career there.