I am with you... Lewandowski is vital for Bayern, its crazy he was never voted player of the year in Germany by the way...
Because of that reason, they should look for alternatives as soon as possible. If not they'll end up like Barca if there's no Messi around them. A good team should be able to perform at their best even though some of the key players are missing.
agree with you, dependence on one player is a very dangerous thing in soccer, Barca's game flow without Messi will be very different from Barca's game flow with Messi.
Bayern Munich is the third biggest club after Madrid and Barca, hopefully with their strength, in the period after Lewandowski retires (
most likely Lewandowski will retire at Bayern because he just renewed his contract at Bayern), they can find players who have the same abilities as Lewandowski.