What's clear is that Leverkusen won't spend all the profits they earned from the sales of Florian Wirtz and Jeremie Frimpong on new players. Management can get around the squad overhaul plan by recruiting cheaper players, and we know that Ten Hag is known for his penchant for signing players in every transfer window. Malik Tillman will be slated as Florian Wirtz replacement, and hopefully he won't disappoint. Ten Hag will likely try to bring in one or two more players before the transfer window closes.
We'll see whether the breakthrough from Ten Hag can make the Leverkusen team better next season. Because Leverkusen still has to make a good improvement in the next season so that it can be at the Bundesliga champion challenger level even though Leverkusen's management will not spend all their money through the sales of the players you mentioned. I am only worried about Leverkusen who might not be able to compete in the top four league standings in next season, even though Leverkusen's previous seasons have become better with Alonso.