He's dependent on CK and Boras... both flawed IMHO.
Gurley is dependent on the OL, the OL Flawed as well.
Both Britt and Gurley if given half a chance can take full advantage of it. I'd put Austin in that category as well but I don't see him as big a threat as Gurley and Britt.
Gurley is interesting... I agree with you, he hasn't looked like himself. My suspicion, as you well know, is 'coaching'... and while not 'conscious mutiny' I believe it is a lack of belief and conviction to what is being attempted in system, game planning, etc. I think the entire "O" is suffering that malady. One on one I'm sure they would espouse 'belief' in their coaches and their system... but inside I don't think the fire is there.