This season Leverkusen's performances were weak compared to their last season's performances, when they were able to remain unbeaten throughout the season. Even though Leverkusen and Dortmund fight for the title next season, with how the Leverkusen squad was able to play well in the middle of this season, I still have hope that Dortmund can not bring them down next season.
No, Leverkusen don't look weak this season, it's just that Munich aren't as weak as last season. Munich have some quality players and that's why it's hard for Leverkusen to compete like last season.
When it comes to the upcoming season, I'm honestly a little skeptical about Ten Hag. I don't doubt the coach but I'm worried that Leverkusen will lose their best form.
I disagree with you, Bayer Leverkusen was weak this season because Bayern Munich was no the only team they faced this season that made them end up not getting any trophy. Bayern Munich got better and wasn't in poor form like last season and Leverkusen became weak as they couldn't win matches that was expected of them to win.
Xabi Alonso is out of the team with Ten Hag brought in as his replacement untill the team is in better shape I can not rate Ten Hag well because he failed as a Manchester United coach.