Duffer appears, to the uninitiated, to be taking his football approach from jose mourinho whom he served under at chelsea. Scoffers may rightly point out that his way is out of date with modern football but mourinho did get a very workmanlike Roma team to 2 European finals in successive years (albeit the football on show was eye_bleedingly awful).
This turkish guys behaviour at LOI grounds over the past year make him sound like a bit of a snake oil salesman but maybe this will work out for shels. maybe.