For next season Bayer Leverkusen will definitely make changes to the team, although not significantly, but this must be done to maintain the team's performance or even make the team stronger, especially since next season Bayer Leverkusen will be competing on the Champions League stage, of course they have to make the team far away. even better so that we can compete fiercely.
Bayer Leverkusen made serious changes this past season so we should be expecting more from them next season.. They did a great job and they will always want to work hard to keep topping That is something have noticed looking at Manchester and Madrid. they keep winning because they already know what it takes to be champions, That is the same reason why Bayer Leverkusen will want to maintain that position to keep topping. For the Champions League, for champions league they won't go that far because the League is full of experienced clubs that will use experience to defeat whomever they are playing against.
Regarding whether it will be better, worse or able to maintain the team's performance, I think everything is still possible next season, but I believe that if Xabi Alonos is still the coach of Bayer Leverkusen, there is a big possibility that they can still be at the top of the Bundesliga standings for the title competition because Bayer Leverkusen's current progress or success cannot be separated from the big role of Xabi Alonso as their coach.
for Bayer Leverkusen to maintain consistency during the previous season I don't think they will drop in performance this season Xabi Alonso would have been making plans for next season because is strategy would have been working for him so next season should not be a problem, and I don't see Bayer Leverkusen changing or even planning on getting a new manager, since xabi is behind the whole success.
This season alone, many teams are interested in bringing in Xabi Alonso, but he has decided to stay with Bayer Leverkusen, but for next season, if Xabi Alonso is able to do the same thing, of course there will be more offers coming and there is a big possibility that he will take on the challenge. bigger of course with a bigger team later.
clubs are after means that make things happen and I don't blame clubs that are after Bayer Leverkusen they knew his worth and what he is capable of doing even if he wants to leave am sure it won't be now he will want to stay a little longer to keep achieving great thing. the man should focus on becoming better there is no rush and if he has a good record he can even get better offers from big clubs so the goal now should be based on improvement.