The media availability with Tanev, Tkachuck and Darryl after the first practice together is here:
https://www.youtube.com/watch?v=ZDlJHddR2DU
It is beyond obvious that he wishes he had more time to make big changes to the system - including who plays where. The system is fine, it is the style - that's him saying that he won't be changing the system outside of making adjustments, and that he will get this team to play with more pace and more commitment as the 'style'.
It is all right there, clear as day.