Craig did a really good job.

The editors didn't. By the last few episodes, the mole became very obvious. Too obvious, which is why I thought Nicole would be the surprise Mole.

But that's not Craig's fault.

The editing this season SUCKED.

First of all, as soon as we saw Mark's confessional in episode 1 crying about wanting to stay for his family, in an oddly placed time, it should have been obvious he was either the first out or the winner.

Many people had interviews that pointed to elimination.

Liz saying that their odds of being executed were greater. She goes.
Victoria saying she wanted to do the quiz and that she was nervous. She goes.
Kristen again talking about the quiz, being nervous. She goes.

Perhaps the most obvious example, in the recap before the episode Paul was eliminated, they highlighted the Paul/Nicole fight from WEEK 2. Duh, it was obvious one of them was going that ep.