I agree with JT last season, he was awesome, especially having played every minute, at his age!
But when defenders fall, it is fast.
The main thing with age is the summer, with a 2 month break in the action, it will take a 34 year old a LOT longer to get back to match fitness that it does a kid in his 20's.
Hopefully when he comes back after his suspension he will be back on the ball (both figuratively and literally). Will have to see.
I was probably too hasty in saying he should retire, I will give look at him again in January and see where he is at.