Maybe, if in the group phase Bayer Leverkusen is not together with the top teams, then maybe Bayer Leverkusen will have a chance to become group winners or maybe just runners up. But the point is, I personally believe Bayer Leverkusen is capable of advancing to the knockout phase of the last 16, the quarter-finals or maybe even qualifying for the semifinals. Because I personally am still quite confident about the quality and abilities of Xabi Alonso, even though there may be several key players who might leave, but I still believe Xabi Alonso will be able to make the Bayer Leverkusen squad good next season. Therefore, failure to win the Europa League trophy and at the same time failing to win the treble winner last season will of course allow Bayer Leverkusen to improve better next season.
As a target for next season, Xabi Alonso will also try to get a treble winner, just because next season Bayer Leverkusen will have to fight in the Champions League. Of course Leverkusen fans themselves must have more logical hopes for Leverkusen's achievement in the Champions League because we all know that competition in the Champions League is always not easy to get through each phase until it reaches the final. However, on the one hand, I also agree with what you said that Xabi Alonso's own abilities still have to be the main appreciation at Leverkusen because he is definitely capable of taking Leverkusen to the semifinals of the Champions League next season.