One point from DublinRef's post I would highlight is:
"This is the great challenge of refereeing high difficulty matches at the very top level and while Kuipers didn't ever let the game get totally out of control, his poor anticipation of the rising tension in the middle stage of the game, backed him into a corner towards the end".
An excellent comment and highlighting again his earlier point whether the referee's prime role in this sort of game is to strictly apply the Laws or to seek to manage proceedings for the greater good of the game.
A dilemma not just at this level. Even at my lowly level I am always mindful of which camp the day's Observer falls into.