Well Scotalnd were down to 13 because they stopped 2 tries by professional fouls so that arguemnet doesn't hold up too well.
Credit to England but they got away with an awful lot of offsides and bent throw ins,at the end of the day they still have no tries in open play.

no guarantee Wales would have scored on either yellow

It was abetter england performance, but the previous 2 were dire, and if wales were on the ball there would have been at least 14 points difference, and thats allowing for englands improvement.