I actually thought Christopher stepped up and showed that he could play the game as well in the latest episode. I think he will be much more interesting and a force to be reckoned with.
IMO, he has watched his father be run over by JR all ofhis life, and is tired of it and not letting it happen to him. He will be someone trying to do the "right thing" but using suspect methods to fight fire with fire.
And I also think JR will be back, his trip is probably setting up some other big twist coming up...