Bayer Leverkusen's performance this season shows that their good performance will keep declining, and they can't challenge for the Bundesliga title in seasons to come, so I won't be surprised if Bayer Leverkusen fails to finish in the top four next season. There was serious competition in the race for the top four in the Bundesliga this season. If Bayer Leverkusen fails to improve their performance next season, they may face difficulty in finishing in the top four.
The dust settles & glow is fading
Last year unbeaten Meisterschale competition & 51 matches unbeaten streak is a fairy tale now.
They lost many things this season, sacrificed DFB-Pokal to third-tier Arminia. Falling out from UCL after a 5–0 aggregate defeat to Munich. On the other hand, Domestic matches aren't so sweet, solid eight points behind the Bavarians, and also lost Xabi Alonso, who challenged Munich for the Bundesliga title last season.
Leverkusen is going to sell several players in its squad. And as a result, their squad will become even weaker. Wirtz is not in Die Werkself next season, it is almost certain