You introduce this interesting thread by making some interesting statements...
'...clearly see us progressing as a team....' and '...Everything has gone to plan so far...'
Really?? The guy is in meltdown, and has admitted that his current narrative re his players may have a detrimental impact on his relationship with the players. He's been dreadfully rude, and is, in my opinion, nothing but a bully.
In answer to the main question, I think that Mourinho needs to change his mentality because his current approach to management simply isn't bringing the best out of the squad... who could we say have become better players under Mourinho? I also would suggest his non-game-time activities and correspondence (via Press Conferences etc) need an assessment, because he has been creating a awfully toxic atmosphere around the views of the club, by his dimissive and rather disrespectiful comments about the crowd, the club's history, the players, other managers, pundits... it's ugly and lacks class.
With reference to his tactics, I would think he has to consider his attacking strategy.. it seems he feels we are a better attacking team without Paul Pogba and Alexis Sanchez, which says a great deal about both his man-management, adaptability, and his general view on tactics , resulting in an 'I will do things this way and I will not change...' mentality. I think this may need to change, as how will any attacking players truly flourish under his management? Why are flair players, match-winners, why are they going to join a team under his management? Why? Why? For massive wages??
What I DO admire, and fully respect Jose for, is the excellent defensive record... that should be commended, hugely. It's an enviable record.. but at what cost?
We are a couple of points ahead of Liverpool and Tottenham, so it isn't as if we are clearly the second or even third best team in the Premiership, we are battling to be a top four team at the moment.