Narrow diamond is half effective as it was since two seasons already. I've used it from lv 1 to lv 5 then realized now is countered by half of the possible formations.

That when you use it. When you face it and use a normal counter (3-1-4-2 ie), you got 30% chanche of dominate and lose. I wonder tho why i NEVER get dominated and win by sheer luck.