It is very, very clear that a lot of work is going on behind the scenes to ensure we manage health and recovery even better.
As for the line highlit above...since we have had a few players return, we have won our three Prem games in that phase, scoring 7 goals and conceding 1. We still have no VdV, Romero, Solanke or Richarlison. Add Davies to the list of semi-regulars missing, and we won't count Werner. He has absolutely adapted as best he could, he has used as many of the squad as you could reasonably expect, and he has integrated very well when given the chance (VdV and Romero have been the two which someone did not).
We have only lost by more than one goal on one occasion in the Prem this season. We are 'mid-table' in goals conceded, with teams like Villa and Brighton having conceded more (City have conceded one goal less). Despite our bricky situation, we remain the team which has scored the second most goals in the Prem behind Liverpool. Ironically, one goal more than Emirates Marketing Project!
I have concluded that people's opinions on Postecoglu are based on personal feelings and are not necessarily statistically supported beyond a similar situation with many other teams.