I will say that Leverkusen was able to win the trophy because it was very well deserved. So I don’t think we should actually say that they stole the Bundesliga title. If Bayern Munich was unable to perform well, it’s their fault.
Leverkusen last season had a very stable line up and was more consistent than before. While Bayern Munich always failed in terms of maintaining its consistency when still with Tuchel. But this season we can't predict who will be the strongest candidate for the title holder this season.
I actually can’t decide if I should say that Bayern Munich should concentrate on the Bundesliga alone or they should concentrate on both the Bundesliga and also the Champions League competition. Because there is a very big chance that if they are actually concentrating in the alone they can win the Bundesliga title. But if they are concentrating in both the Bundesliga and also the Champions League, they are unable to win either of them. So they will have to make a choice here.
Regarding how Munich will arrange the strategy, it all depends on the ability of Vincent Kompany who is responsible for the future of the Munich squad. If the coach is indeed able to pursue titles in 2 different competitions, there is nothing wrong with trying. But I agree more with your opinion that it is better for Munich to focus on fixing the problem of defensive weaknesses and can regain the reputation that was lost last season. On the one hand, I am also not sure Vincent Kompany can rotate perfectly to pursue the UCL and bundesliga titles.
I still do not trust Komoany with Bayern Munich. Not because he’s a bad coach, but because he has not had any experience with such a big club ever before.
It is natural if you still doubt the coach because in fact experience can be the biggest influence for a coach to be able to bring his team to a higher level. But we also have to give the coach a chance to prove it first. Because a coach like Xabi who has no experience whatsoever can also bring Leverkusen to win the bundesliga title.