For sure will it be very hard for Leverkusen next season with all that players that already left , specially Florian Wirtz can be not be replaced.
To be honest i am not really a fan of Erik Ten Hag and maybe its possible that we will see the same as it was in Manchester.
Fingers crossed that this will be not happen and also that they get a few new good players into the team.
To be honest, I have no confidence in Ten Hag as Leverkusen manager next season since I don't think he's a good manager, despite winning two trophies in his previous team. Though Manchester United management was impressed by the two titles he won in two seasons and extended his contract, he was unable to continue because he failed to meet the team expectations. After all, everyone expected him to finish in the top spot. I'm not sure about Ten Hag time at Ajax, perhaps the Manchester United project was challenging for him.
However, many players are leaving Leverkusen before the next season, including Jonathan Tah, who left as a free agent, Frimpong, who joined Liverpool, and Florian Wirtz, their key player, who will be difficult to replace because Ten Hag lacked the experience to bring top players to the team because all of the players he signed while at Manchester United didn't work.