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.
I support your doubts about Leverkusen in the coming season. We have 2 reasons to support our doubts as Leverkusen signed coach Ten Hag and if Florian Wirtz leaves Leverkusen, it will be a very bad condition. Wirtz is one of the players who is very productive and contributes to the team. And if he leaves Leverkusen, something bad could happen and I can't imagine how Leverkusen will be in the new season. On the one hand, it won't be easy for Ten Hag to find a replacement for Wirtz. On the other hand, Ten Hag's past makes us all skeptical.