Bayern Munich has never had a big impact on the team's performance when one of their important players left as well as this time, because the Bayern Munich team's game is very solid in all lines. Likewise at this time, I think with the departure of Robert Lewandowski will not bring Bayern down.
and for Lewandowski's performance I think it's also too early for us to judge and compare when he was with Bayern. because a player needs to adapt when entering a new club and at this time the season has just started.
I will have my doubts but I feel Lewa will come good in Barca. The nature of football played in Bundesliga and Laliga are similar ( free following and possession football). All he needs to stay fit and settle in with his new teammates for a better team cohesion. For Bayern they are doing quite well without him, although it is just there league let see how they cope In the middle of the season or either UCL. But with Sadio mane although not a natural Number 9 they have a great replacement for Lewandowski