Bayern have to fill his place because of Lewandowski's willingness to leave. Ronaldo can still play ball at that level. I don't see it as a situation against Bayern's structure. What I would criticize is: Bayern Munich is a simple team in the champions league. And if they lose the star in their hand, they can't show any success. Winning the German league is no longer an achievement for Munich. Their goal should be the champions league. If they call themselves the big team.
Supposedly, a statement from Bayern's top brass some time ago was enough to prove that Ronaldo would not be brought to Bayern regardless of whether Lewandowski was there or not.
They've said they're not interested and I think that means that having Ronaldo there or not they're confident enough to get into the season.
Actually the possibility is closed for Ronaldo now with Bayern so can't give any speculation about him and Bayern.