Think we are on the same page with this.
United tend, (as Gary Neville hinted yesterday and Keano said the other week) play only in a 'few moments' each game, if in those moments we can score then we have a chance, because at some stage we are going to be put under pressure, and not just by 'good' teams... but by everybody.
In those 'precious moments' however we need the likes of Casemiro and Eriksen in mid field and such as Garnacho on the wing, to support and supplement Rashford's new lease of life.
ETH knows this is a squad game, if you want to be competitive/successful in all the major trophies. He also knows (or should by now) that bar a handful of his current squad, he has nothing like the overall skills in the squad, or in depth, or in commitment, either. Erik seems to know what he's about most of the time and does occasionally gamble with his substitutions, which of course both the greats Busby and Ferguson did, perhaps more often that many of the younger fans appreciate. They also suffered their share of high scoring defeats along the way.
Whats the saying... "a man who never made mistakes, never made anything"? Well both Sirs Matt and Alex did do and both learned from the experience, lets hope ETH is the next in this great line.