I've heard he can also be abrasive and quarrelsome: seems to make a habit of falling out with everybody. And I don't think he'll allow Kane(pen) to play as selfishly as he does, he'll want him to put a shift in and that would be anathema to the golden boy, he prefers the team to built around him - he is the focal point of the team.
If Poch was (as some have suggested) leant upon to ensure Kane(pen) played the CL Final what more evidence is needed to prove he is centre of all things Spurs? And from the admittedly very little that I know about Nagelsmann,
I can't see him allowing that to continue.