Well, this big picture or grandscheme you talk about can only work with the right personnel in charge. Without the right personnel, we will simply not get to this destination you talking about. It's like that too in the corporate world of any business. You can dance around in circles pretending to make progress when in reality you aren't.
And I am sorry I don't see Ole, Carrick and Mike Phelan capable of challenging the top managers of the game. They simply don't have it in them. TIME does not automatically imbue anyone with what they don't have.
You talked about reactionary or short term perspective. I put it to you that most of the people who want Ole out are not petulant at all. They have assessed him over a long period to come to the conclusion that he is not the man for us. I for instance didn't expect him to win the league. Not at all. I loved the man and gave him a fair chance even when the club reneged on the earlier statement of 'finding a suitable replacement at the end of the season'. I expected him to have at least had a discernible pattern of play which we consistently apply. But alas! None. Just a mismash of diverse, ineffective styles week in, week out. Underdog status football at it's best.
The managers you talked about who failed(LVG and Mourinho) were on the downward spiral of their careers. Mourinho had already been effeminated by Madrid and his hubristic demeanour had vanished while LVG's highlights were last prominent 10 years ago(not counting the bland World Cup campaign with Holland). And moreso, because Mou and LVG failed, does that make Man United to be excluded from chasing top managers in the game anymore?
None of them were progressive managers on an upward trajectory like Ten Haag, Rose, Nagelsmann for instance. Those are the kind of managers we should be targeting and I can bet my life, they will do better here than Ole. It is not rocket science. They know what they are doing. Ole doesn't and I don't see any improvement at all.
The only reason why Ole is still managing us is because we are entrenched in sentiments as a club, he is the perfect Glazer puppet whom the match going fans will not turn on and we are not a serious football club anymore. If we were a truly ambitious club (others have sacked managers for less), he should have long been gone. Do you think Ole would survive at Real, Bayern, Juve for instance with a winning record like the one he currently has at Man United? The answer is a big NO. Because those are clubs who don't tolerate mediocrity. We do and that is why we are not catching up with them any time soon. Untill Man United as a club look beyond these 'We need another Fergie, Class of 92, United Way' nonsense, we will remain in the trenches of the European game. OGS is not a Manchester United Manager on merit. If it were, I doubt even Championship clubs would seek his CV.
Now whether ascending back to the summit of the European game as a club is of primary interest in your opinion is up to you to decide or whether the romance of 'It's Solksjaer again' trumps whatever we do as a club. But hear me, Man United cannot eat their cake and have it. We will either choose as a club to be progressive or choose to wallow in mediocrity and sentiments. One of this has been happening last seven years and if we keep going in that slope, there is only one outcome and it will take more than lip service to rise again.