Lyon has improved immeasurably over the last 18 months. He used to be so inferior in comparison to someone like Greame Swann but now he's become a clever bowler who can either defend or attack like Swann could and gets good players out. This allows them to rotate their quicks.
Now if you give Lyon a 4th/5th day pitch he makes it count like Swann used to, that hasn't always been the case.