The bottom line is that you are always compromising if you play two sevens, and it certainly looks as Wales are doing that because they are playing their best seven, Warburton, out of position at six, and are missing his presence as first man over the ball. The truth is that Tipuric is a wonderful footballer- he could be a star of the Sevens at the Olympics if he should be so minded - but he is not a presence at the tackle area in the harshest Test arenas.