I will say something honestly now-

Sometimes i feel that formations and orders matter. U beat stronger teams by countering them. And when u make a change u can see the stats change. Arrows too i feel matter somehow. When i used to lose be4, i used to put all my players on red arrows. And that used to show a sudden drop in possession...... So these things kinda show that these things work.
But, if these things work, why do these "troll" results against so weak teams happen???? Why can a team 3* below u beat u when u have countered their formation, while on the other hand, in the next match u can beat a team 1* above u without doing simply anything??? Where does the formations and orders go then??? Or do they never make a difference and the game is programmed in a such a way to externally show us that the changes have changed something, while internally in the ingame, all is the same???
I guess we will never know till Nordeus open their mouths And they will only open it to scream on doomsday..... So all this discussion is in vain