Before the previous international break the team played against Bologna (I guess). It was an impressive display: fluidity, speed, one-touch passes, pressure, intensity, etc. It was indeed a performance of the top team. So Max clearly knows how to play this way. But for some reason (conserving energy, etc.) he prefers not to do this regularly.
One of his strengths is the ability to use many tactics instead of sticking to a single one. But, as it often happens, his biggest strength is his biggest weakness. When your team always rotate tactics, and as a main one use that "conserving energy" one, you can never be sure that they will be able to flawlessly switch to the "top team" tactics when it's crucial to use, like in the UCL final.
If you want to be sure that your team will steamroll ANY opponent, your team have to steamroll EVERY opponent. Like RM, FCB, BM and other top teams in their best years did. Otherwise your guys won't be simply experienced enough in using that mode. And because of this, even though your team are capable of such performance on paper, they will likely fail to show it when the stakes are really high, like in the UCL final. Because when you're nervous, it's better to do what you're used to.
And this is what already happened to Max. Yet he doesn't seem to have realized this obvious state of things.