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.
There is no certainty regarding negotiations, Bayern did not let him go cheaply. Although Lewandoski's heart already wants to leave, he has a contract at Munich until 2023. There are two possibilities for him to adapt quickly or fail. At the moment many Barcelona fans have high hopes for his arrival, but they don't realize the price he is still quite expensive for Barca's finances. Bayern held Lewandoski like Barca held De Jong.