Here's the current rule for high bumps sourced from the 2012 tribunal handbook. It's really quite straightforward and most of the arguments around Ziebell protecting himself, touching the ball first etc. are irrelevant. The only real question under the rules is whether he had a realistic alternative way to contest the ball.
On the rules you've shown there's no argument he's guilty. With his history he should've taken the 3 weeks.
Still don't like how soft it's all getting.
And yes, North whinge a lot. Contributed to Goddard's two weeks by having a cry. Bit Hypocritical.