Of course, all teams that have new coaches hope to be better than before, including the fans of each team who of course also hope that their proud team will show the best. with Bayern Munich failing to win a trophy, of course it disappointed their fans, but I think the brand's fans can still accept it because just this season they failed to win a trophy, of course they definitely want Bayern Munich back to its glory days, but it's true that you say Leverkusen is still a title challenger for Bayern Munich.
It's true what you said, Xabi Alonso certainly has to be able to balance his focus. With this, Xabi Alonso can definitely do it well, they still have to be able to appear consistent in both. I don't think Leverkusen will experience a decline, but in the Champions League they might have difficulty competing because the teams they will face are big teams. This is actually a good opportunity for Leverkusen, because they will face an experienced team that can sharpen their mentality to become better.
Coaches are changed so that something in the team changes for the better, but it seems to me that this can only be counted on if a truly experienced coach comes to the team, and not one who will gain experience with a stronger team. It seems to me that for the result the level of the coach and the team must match, and I don’t know how ready Kompany is for such a team. On the other hand, he had a very good teacher, perhaps one of the best, and he already had some experience as a coach.