Leverkusen main pressers per a midfield pressing are Baumgartlinger and Aranguiz with around 21 pressures per 90 minutes - Havertz plays a low key role in that with an average of 12 pressures per 90 minutes (the success rate with 31.7 % is ok). Özil actually is not that lazy guy he is always told to be - he has 19.1 pressures per 90 minutes but only a 20% success rate, what tells more about the coordination of Arsenals pressing than about Özil himself (if you know that Özil just does not have the personality for a team leader! and do not expect him to be something else - the biggest problem in my eyes is to expect things from him that he just cannot fulfill. He should be the artist and not the worker - and for sure not the leader!)
In your team it is more distributed between forwards and midfielders - KdB has 18.5 pressures with a 29 % success rate - David Silva 16.5 pressures with 30%
I think that Havertz is still raw and his development can go in different directions. He e.g. could develop into a more defensive b2b-position if he would bulk up a little. That he in a top team with 21 cannot be the leader should be given - he needs others to lead him...