I agree that counter is easier to use with shouts, like pump ball into the box, use the flanks, but you will also need pacey wingers and striker (for me counter tactics use a 4-3-3), run with ball, cross from 3/4, and quick tempo, no time wasting.
The D-Line should not be too down, or else the other team will have time to get player back since yours need to run more space, but you cannot use it higher, for obvious reasons.
The mids should be BMW, with determination, aggression, tackle and stamina.
I don't agree with a narrow formation since the majority of teams that play counter IRL explore the flanks, not the middle.
In my tactic, me best way to explore counters is after a free kick or a corner, and to meet that i always put one winger and the striker in attack and the other winger in front of the box. All the others should into the box to clear the ball to the winger outside, who will then run and/or pass the ball to the other 2. Since the center backs are in your box, and the other team will normally have the 2 FBs at the back, you can find yourself with 3 vs 2 man and the counter is done
So, in conclusion:
Defenders: good header, tacklers and excellent positioning
Mids: stamina, tackle, determination and agression
Wingers: pace, pace pace
Striker: composure, pace
ALL: team work