I'd like to see it myself but I think O'Neill dissed the notion recently saying its one thing being able to work on this day in, day out at club level, but international breaks are too short to try something radical.
Do we have the players? O'Shea, Clark and Wilson would be the right type of player.
I thiink the summer friendlies would have been a good time to do it myself.
One feature of this World Cup was teams with a regular back four allowing the full backs to get forward with a defensive midfielder dropping back to make a back 3 when the full backs are attacking.
Sometimes I do despair at our perceived inflexibility. Are the players really that thick / one dimensional?
It's a shame McClean didn't impress at left back v Costa Rica.