"how can you have over 70% of possession and 3 good breaks and come away without a score?"

Simple - have Parks at No 10. He's reverting to his old habits of snatching defeat from the jaws of victory. He's not even the Blues' furst choice kicker nowadays, and while he may be a really nice guy who gives 110% for the team, what really matters is the ability to control the game. Apart from anything else, he has a tendency to go for the drop goal as soon as he gets in range rather than waiting until it's obvious that a try isn't going to be scored.