Kovač is an interesting one, I am expecting him to do really well in short term but then to loose dressing room and get fired before actually finishing the job. He is a coach that demands a lot on trainings, there is also a lot of medical tests, mandatory diets and whatnot included. That usually ends with locker room senators getting pissed and just waiting for first bad result to start undermining him.
Not quite a good start my a say, red card and a lost at home against Stuttgard. Maybe in a next game but yes he is an interesting coach would like to see him longterm on Borussias bench.