Even lost of few players surely going to have impact, but now he can bring few those could be give better, and they can keep balance in this club too much negative hype about his arrival but still he is capable of giving good results as he has done at Ajax for me, he can be successful here. Xabi Alonso done amazing stuff but now it's also test case for Bayer Leverkusen because challenges are increased, and they are having hard time for staying into good place can they survive with ETH it's another big challenge like Vincent Kompany done at Bayern Munich.
Now Eric Ten Hag contributes more to re-build his damage reputation. Because currently Eric Ten Hag is facing a lot of criticism which may cause demotivation for him. But he has to stand with a strong dedication. He is now in the position where his single or minor mistake could reach hype. So, it's time for him to take things wisely. When expectations increase the challenges also increase. And i think being under pressure can also affect the performance. It's better for Eric Ten Hag to avoid such pressure and criticism and just focus on the desired goals. This will help him to stand again in his community.