I'm just going to try and be a contrarian here. I'm not Ole-in by any measure, but this is something I don't quite subscribe to. Let me explain why.
Take managers like Big Sam (or Dyche). By most measures, Sam got more out of his sides than he should have when he managed smaller teams. Same argument with Dyche. But most people laughed off the idea that "Allardici" would win things with a top club. The common assessment was that he was a fantastic battler of relegation, but would struggle with top sides because of his setup and style. This was vindicated (in most people's eyes) too. It's an art, but not the greatest one, to build a well-drilled system designed to theoretically over-perform with a bunch of very limited players when the expectation is to avoid relegation or be mid-table at best. It is easier to make a system that works when you have an (almost, if not entirely) uniformly average group of players. They're normally at ease with a system designed around their limitations. The same is obviously applicable when you have a uniformly excellent group. You can make a system that relies on excellence across the pitch. Still an art of course, but not the most difficult thing in the world.
Things become different though when you are at a club with bigger ambitions and also, when your group is more disparate. When you have a sprinkling (say 3-5) of very good players with some (say 3-4) abysmal / deeply average players in the mix too. Now, the manager must either ask all the better players to play at the level of the weakest links or design a system geared for the good players and try to "make the most of what you have" with the lesser ones, while you work to fix the gaps. The latter approach will lead to a bunch of occasions when the average players let you down massively - and also situations which frustrate your better players, with the odd occasions that everything "just clicks". Would United, for example, be better off this season with a strongly regimented approach of play designed to cater to the limitations of ball-playing of our midfielders (pre-Bruno and without Pogba)? Quite definitely. Enough evidence even in Jose's stint to justify this hypothesis. That said, play a system geared towards having good players and there's a chance that the system could almost instantly (hopefully) show dramatically improved results the moment you get better players into those positions that the average / abysmal players (like Young, Mata, Pereira, Lingard etc.) were occupying.
TL/DR: I don't subscribe to the view that managers "getting more out of a limited squad" is always a great measure as it's easier to manage a uniformly average squad than one with islands of excellence and some troughs of abysmal mediocrity.