Overall, Leverkusen can be said will be facing a transition period next season, and not only Ten Hag who needs time to adapt, the players also have to rebuild the chemistry between them.
Meanwhile, I don't know the reason why Ten Hag is too obsessed with recruiting his former players, even though the players he is targeting look good, but it is not certain that these players will be able to perform according to expectations.
If Leverkusen management wants to recruit Antony and Garnacho, they will probably spend all the profits they get from the sale of Florian Wirtz. Antony will probably choose to stay with Real Betis.
True, Bayern Leverkusen have prepare good transition for next season after leaving by their manager Xabi Alonso and several top players who leave Leverkusen for joining with other top teams. For awhile, Jonathan Tah have reached agreement deal for joining with Bayern Munich and Jeremie Frimpong have deal for joining Liverpool next season, both players are important part for Leverkusen in this season and crucial player won Bundesliga tittle last two season. Transition moment still not stop for Leverkusen after having rumor Florian Wirtz linked with Liverpool maybe will leave Leverkusen around few days or weeks later.
As new manager, its quite heavy work for Erik ten Hag how to build up again chemistry with several new player recruitment indeed so far Bayern Leverkusen still not announce yet, looking for several main player leaving I think Leverkusen will sign around two until three player for next season.
Leverkusen will like face a difficult time come next season because they are in a different phase of their club because a new coach will be coming to the team which means that a different style of play which the players will follow and the truth is that it's not easy for players to follow and master the playing pattern of new coaches because it will take a while before the players will adopt to the style of play of the new coach.
The truth is it will not be easy for the new coach to come and fill up what Alonso has done in Leverkusen because he has created a record that will be difficult to break