[James]

The producers have realised the mistake they made with the gimmick of the double-eviction (remember how dull the following week was?) and they are just repairing the damage.

And I don't think that Jon's opinion of Cameron is too important. He's probably seen the times that Cameron talked behind his back in the diary room and after the Ray incident.
Although Cameron has popularity many people believe he is not being himself completely. If Jon helps to bring out the real Cameron it may even help Cameron's chances of winning!

Game on.