Yes, in my opinion we cannot compare Leverkusen with Napoli because Napoli performed impressively in the 2022/2023 season but then their performance became very bad in the 2023/2024 season. Leverkusen has a genius coach like Xabi Alonso and I am sure he will be able to bring Leverkusen back to competing at a high level. Leverkusen has a weakness in one-on-one play and it was visible when Atalanta implemented highpress man to man marking tactics. But I'm sure Alonso knows his team's weaknesses and will make several player purchases in this transfer window. I'm not sure Leverkusen will go undefeated again next season. But Leverkusen will still be able to win the Bundesliga and may also be able to reach the UCL knockout stage.
Defending the Bundesliga title is not easy, but what I still believe is that Leverkusen will still be able to maintain its performance next season. Whether it is winning the Bundesliga or not, I think the percentage will not be too big because Bayern Munich has also built its team to be stronger.
And Leverkusen will compete in the UCL stage next season, they will face difficult opponents there so it is right for Leverkusen to build a stronger team.
So far we haven't been able to map out the strengths because we haven't seen Leverkusen's movements in the transfer market, maybe after the Euro the teams will aggressively recruit players and I really hope that Leverkusen will bring in lots of quality players.