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.
Bayern will simply raid Dortmund again and buy their ready made players, thats what they have been doing season after season. Sancho is one player that they failed to buy, but next season I feel theyll buy him and further improve on their title credentials. Lewandowski is vital to Bayerns plans, but going ahead they can easily replace him but a lot will depend on who their coach is and what system would he like to play.