About the 4-2-3-1, no we didn't outscore Napoli, but that Napoli would score 3 goals against us in any formation. That's just because our defenders are slow and we generally suffer in defense anyway.
Main thing is, like Nick said, we were a much better footballing team and we were scoring goals for fun. Not to mention those games were like the first games we tried the 4-2-3-1 and it kind of worked instantly.
We give all formations time, even the ones who don't give us any results, but just seem to have written off the only formation that gave us some hope.
Anyway.. I love all the talk about formations that would make sense, but we all know we're playing with 5 defenders again. Zac will probably hold on to it, oh the joy. But like a wise man on here once said to me, I'm only sitting behind a monitor and Zac's on the Juve bench, so what he does makes sense, what do I know..