Mental processing speed, Romo was off the charts football intelligent. He never had even an above average defense and usually a porous line until the end of his career. If Parcells only had someone else hold the field goal snap or if the refs only trusted their eyes when a WR makes a catch and the ball never touches the ground... hard luck Romo...
Dak, great leadership and better than average skills. He has had weapons around him. But, under great pressure, he simply has not performed well at all in big games.