Our issues in europe were not related to the formation, but down to mentality.
I recall our 352 demolishing Chelsea despite having $#@!ty forwards. And chelsea had excellent fullbacks, and class wingers.
If we play with our killer mentality switched on, in good physical shape, our wingbacks will lock down the wings, and our CM+vidal will take the fight to their box.
Only Bayern and madrid, would require a change, because their wingers are so exponentially faster, that you need fullbacks instead to avoid getting countered to $#@!