I know it's not accurate, but I felt he was suffering from 2nd year syndrome this year.
He was an out and out star last year, and was carving oppositions to pieces.
Then the opposing coaches really focused on what they needed to do to stop him over the off season.
You could see a very deliberate change in the way defences "approached" him this year (sometimes, spectacularly badly as in Sualli knocking him into next week).
Defences were limiting his space, jamming in, in defence and he struggled to adjust his game. He also suffered from different spine combos throughout the year.
I think he will bounce back next year and will work on overcoming defences taking away his space.