Exactly
Pirlo would barely be useful as a sub in a 4-2-4, imagine an over-worked Vidal at the 70 minute mark having to cover for Pirlo, and imagine how open we would be on the counter
I'd rather stick to a 3-5-2 unless our front 4 in a 4-2-4 was some sort of 300 million mega-line up. So, basically. No.