It was shocking because it was so predictable you would not have actually thought that it may happen, so therefore it did shock you when they did the unpredictable by doing what you thought was too predictable.
deep
Anyhow, all stupiditiy aside, I don't think that mole thing is too cheesy. What annoys me, though, is having the possibility of President Palmer's new love interest have some sort of shady background. Heck, that Wade guy does not seem to 'feel' right. That annoys me because it seems as if that Palmer getting betrayed in some way plot-line is just getting a bit old.