I use to win 6-0 or more in league vs 4-4-2 flat and have hard times scoring even one goal again the same 4-4-2 in cup, with same qualities around. It's just that you get penalized in cups vs weaker teams, and that s it. For what i can add, playing 3 back with no dmc vs any formation with 2 STs isnt good, you ll alwais get goals against. If you scorr back nps, if you dont, loss gets you.