I am actually in favour of 4-3-2-1 or 4-2-3-1, but was never in full support of the 4-3-1-2. The 4-3-1-2 has so far failed, and even with the other formations I would like to see, we might potentially fail, as we currently lack the tools to play any formation, let alone 4-3-2-1 or 4-2-3-1.
As for our defence, I don't see how much more damage Grygera, Grosso, and Co. need to do before we can actually afford some opportunities to other players.