I personally don't think we have the right players for the 4-2-3-1 system.
Technically we do, as our technical attributes as a team (and individually) are strong, but I think we lack the essential temperament to get this system to work. We lack the experience, concentration, focus and decision-making ability that other teams possess who employ that particular formation.
It requires a very fluid style of play, and sadly I don't think that the majority of our players are up to scratch in the mental toughness.
Aside from that, our better chances, and indeed goals, have come from out wide - both Rooney and Sturridge scored from crosses (also the 4-2-3-1 deploys wide players who can push forward, whilst also encouraging overlapping full backs). My issue with Roy's interpretation of this is that I don't think Sturridge or Rooney are line-leading attackers. Sturridge is becoming a great striker, but he drops deep (either at Roy's instruction or his own) meaning that when we get the ball out wide there's so few options in the box. Sterling, Sturridge and Rooney aren't exactly a massive threat in the air, nor do they have the top class movement that small top strikers possess - see Suarez last night.
I really think we should have gone with Lambert last night. He's a target, he's strong, he's got excellent technique and is a finisher. We need a target up top (Shearer and Crouch have proved successful at international football/international tournaments) and sadly we've really lacked that threat this time round.
Lastly, I don't really understand the bashing of Rooney or Johnson. I think they've played better than most in the team so far, and have chipped in with goals and assists. Johnson has got to be one of the only full backs in the tournament that can beat a player both ways (oo er) and that's an essential skill to have. The four goals we've conceded haven't really been at their hands either, although admittedly Johnson could have closed down Cavani with a bit more bite yesterday).
Same ol' story every time.