Bayern Munich is still best club in Bundesliga even though they lost to Leverkusen. They had some ups and downs which allowed Leverkusen to take the lead. But I think Bayern will come back stronger next season because they learned from their mistakes. A big club like Bayern won't give up after one bad season. They will work harder and be back on top soon. Bayern hired new coach Kompaney but he did not do well in his last job so it is unclear if he can help Bayern improve. One thing is certain Leverkusen is likely to have another great season while Bayern still has a lot to prove.
By the way Leverkusen is doing well and Bayern Munich is struggling. Leverkusen has good players and good coach so they will likely keep doing well.
Yes, even though Bayern Leverkusen won this season's Bundesliga title, Bayern Munich remains the best club in the Bundesliga league because Bayern Leverkusen has yet to achieve what Bayern Munich has achieved. Bayern Munich is the most successful club in Germany. I disagree that Bayern Munich has learned from their mistakes because we have yet to see them perform. When the new Bundesliga season starts, we will know if Bayern Munich will do better next season. Bayern Leverkusen will rival Bayern Munich for the Bundesliga title next season, and if Bayern Munich is not well prepared for the new Bundesliga season, Bayern Leverkusen might beat them again for the Bundesliga title.
Let's wait till next season before we start arguing on the team that will be champions of Germany next season but from the last performance of the teams last season, Bayern Munich and Bayer Leverkusen needs to be careful next season if they want to be the only rivals challenging for the league because the Stuttgart team also looks power from their performance last season. Bayern Munich's performance was having a bad season last season but they have got a new manager at the end of last season so they will have no other options but to revive the team and get to be back to being the champions again.