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.
Since there are few players to leave the team, it surely will be a difficult situation for Leverkusen. Florian Wirtz is rumored to move to Liverpool, he will follow Jeremie Frimpong. Jonathan Tah moved to Bayern Munich. And it is not impossible that other players will also leave the team. This is a big challenge for Erick Ten Hag because he must be able to sign new players who can replace the role of those key players.
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.
Ten Hag manages a different team, the target will be also different. Also, the level competition in Bundesliga isn't the same as EPL. So, I think Ten Hag is possible to succeed with Leverkusen although it requires a better squad. The first thing that Ten Hag needs to do is to rebuild the squad. If he can sign some good players, we can expect that he can do better job in Leverkusen. TBH, I really hope Ten Hag won't repeat the same mistake that he ever did in Man United.