It's not just tactics and formations, it's mentality, intensity, aggression - all those other intangibles. We need to be quicker to the loose ball at home, we need to be more aggressive in challenges and especially under aerial balls. We can't ever be outworked or outfought at home - it's the one thing for which there is no excuse.
But yes we desperately need to find a system that allows us to put together some patterns of play, and to sustain attacks. It's about finding a balance where we can carry a threat but avoid the huge defensive mistakes that are happening at home.